Name: SIEMENS 6ES7313-6CG04-0AB0
Brand: SIEMENS
SKU: K0252207

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Delivery information
Export identifier	AL: N ECCN: EAR99H
Net weight	0.56
Quantity	1 Stück
Packaging quantity	1

Additional product information
Product status
EAN	4025515079071
UPC	040892788587
Static lot number	85371091
List indicator	ST73
Product group	4256
Country of origin	DE
Compliance with the substance restrictions according to RoHS directive	Since: 20110520

Product classifications	Version	Classification
eClass	4	/
eClass	5.1	27-24-22-07
eClass	6.0	27-24-22-07
ETIM	3	/
ETIM	4	EC000236
ETIM	5	EC000236

What is the 6ES7313-6CG04-0AB0 and where is it used?

The 6ES7313-6CG04-0AB0 is a SIMATIC S7-300 CPU 313C-2 DP from Siemens. It is a compact CPU with integrated MPI/DP communication, 16 digital inputs, 16 digital outputs, 3 high-speed counters up to 30 kHz, and an integrated 24 V DC power supply. A Micro Memory Card (MMC) and a 40-pin front connector are required for operation. The module is typically used in machines and existing systems where a compact PLC with local I/O, PROFIBUS connectivity, and solid cycle performance is required. The model is particularly relevant for spare parts procurement, retrofits in existing installations, and the rapid restoration of older S7-300 systems.

Overview of the key technical data and what it means

The CPU operates on 24 V DC with a permissible range of 19.2 to 28.8 V. It features 128 KB of work memory, requires a plug-in MMC as load memory, and stores programs and data on the memory card without the need for a battery. Important for maintenance personnel: the CPU processes bit operations in a typical 0.07 µs, supports 1 integrated DP master, can connect up to 124 DP nodes, and provides 4 high-speed outputs as well as 3 counters up to 30 kHz for pulse, counting, and simple positioning tasks. With dimensions of 80 x 125 x 130 mm and a weight of approximately 500 g, it remains compact. For procurement, this means a high level of functionality in a small footprint without requiring additional CPU peripherals for standard field applications.

Product status, life-cycle status and obsolescence

Siemens officially classifies the 6ES7313-6CG04-0AB0 as a spare part. At the same time, manufacturer life-cycle information shows that the product is within a phase-out and discontinuation environment, as Siemens has already announced the phase-out of the S7-300 / ET 200M platform. For operators of existing systems, this is a clear indication that while the module remains important for ongoing operation, the risk of procurement difficulties and downtime will continue to increase over time. For modernization projects, Siemens identifies the S7-1500 as the natural successor platform. In Siemens migration guidelines, the CPU 1511C is listed as the target device for migrating a CPU 313C-2 DP. However, this is a migration path rather than a direct 1:1 replacement within an existing control cabinet.

Available EICHLER services and when they are relevant in practice

For this module, EICHLER offers several practical procurement and service options: repair within 2–5 days, exchange service within 1–3 days, used units within 1–3 days, and new units within 1–3 days. An optional test report is also available. For repairs, EICHLER explicitly includes technical cleaning, preventive maintenance, comprehensive functional testing, and a minimum 24-month warranty. This is particularly relevant for manufacturing companies where downtime costs are high, the system cannot be migrated in the short term, or identical legacy hardware must remain in operation. Exchange units and tested sales stock help to minimise downtime, while repairs and life-cycle-oriented spare parts strategies help to manage obsolescence risks in a controlled manner. EICHLER additionally provides a 24/7 spare parts service and optional warranty extensions of up to 36 months.

Attribute	Value
General information
Product type designation	CPU 313C-2
HW functional status	1
Firmware version	V3.3
Engineering with
● Programming package	STEP 7 V5.5 + SP1 or higher or STEP 7 V5.3 + SP2 or higher with HSP 203
Supply voltage
Rated value (DC)	24 V
permissible range, lower limit (DC)	19.2 V
permissible range, upper limit (DC)	28.8 V
external protection for power supply lines (recommendation)	Miniature circuit breaker, type C; min. 2 A; miniature circuit breaker type B, min. 4 A
Mains buffering
● Mains/voltage failure stored energy time	5 ms
● Repeat rate, min.	1 s
Load voltage L+
Digital inputs
— Rated value (DC)	24 V
— Reverse polarity protection	Yes
Digital outputs
— Rated value (DC)	24 V
— Reverse polarity protection	No
Input current
Current consumption (rated value)	800 mA
Current consumption (in no-load operation), typ.	110 mA
Inrush current, typ.	5 A
I²t	0.7 A²·s
Digital inputs
● from load voltage L+ (without load), max.	80 mA
Digital outputs
● from load voltage L+, max.	50 mA
Power loss
Power loss, typ.	9 W
Memory
Work memory
● integrated	128 kbyte
● expandable	No
Load memory
● Plug-in (MMC)	Yes
● Plug-in (MMC), max.	8 Mbyte
● Data management on MMC (after last programming), min.	10 a
Backup
● present	Yes; Guaranteed by MMC (maintenance-free)
● without battery	Yes; Program and data
CPU processing times
for bit operations, typ.	0.07 µs
for word operations, typ.	0.15 µs
for fixed point arithmetic, typ.	0.2 µs
for floating point arithmetic, typ.	0.72 µs
CPU-blocks
Number of blocks (total)	1 024; (DBs, FCs, FBs); the maximum number of loadable blocks can be reduced by the MMC used.
DB
● Number, max.	1 024; Number range: 1 to 16000
● Size, max.	64 kbyte
FB
● Number, max.	1 024; Number range: 0 to 7999
● Size, max.	64 kbyte
FC
● Number, max.	1 024; Number range: 0 to 7999
● Size, max.	64 kbyte
OB
● Number, max.	see instruction list
● Size, max.	64 kbyte
● Number of free cycle OBs	1; OB 1
● Number of time alarm OBs	1; OB 10
● Number of delay alarm OBs	2; OB 20, 21
● Number of cyclic interrupt OBs	4; OB 32, 33, 34, 35
● Number of process alarm OBs	1; OB 40
● Number of DPV1 alarm OBs	3; OB 55, 56, 57
● Number of startup OBs	1; OB 100
● Number of asynchronous error OBs	5; OB 80, 82, 85, 86, 87
● Number of synchronous error OBs	2; OB 121, 122
Nesting depth
● per priority class	16
● additional within an error OB	4
Counters, timers and their retentivity
S7 counter
● Number	256
Retentivity
— adjustable	Yes
— preset	Z 0 to Z 7
Counting range
— lower limit	0
— upper limit	999
IEC counter
● present	Yes
● Type	SFB
● Number	Unlimited (limited only by RAM capacity)
S7 times
● Number	256
Retentivity
— adjustable	Yes
— preset	No retentivity
Time range
— lower limit	10 ms
— upper limit	9 990 s
IEC timer
● present	Yes
● Type	SFB
● Number	Unlimited (limited only by RAM capacity)
Data areas and their retentivity
Retentive data area (incl. timers, counters, flags), max.	64 kbyte
Flag
● Size, max.	256 byte
● Retentivity available	Yes; MB 0 to MB 255
● Retentivity preset	MB 0 to MB 15
● Number of clock memories	8; 1 memory byte
Data blocks
● Retentivity adjustable	Yes; via non-retain property on DB
● Retentivity preset	Yes
Local data
● per priority class, max.	32 kbyte; Max. 2048 bytes per block
Address area
I/O address area
● Inputs	2 048 byte
● Outputs	2 048 byte
of which distributed
— Inputs	2 030 byte
— Outputs	2 030 byte
Process image
● Inputs	2 048 byte
● Outputs	2 048 byte
● Inputs, adjustable	2 048 byte
● Outputs, adjustable	2 048 byte
● Inputs, default	128 byte
● Outputs, default	128 byte
Digital channels
● Inputs	16 256
— of which central	1 008
● Outputs	16 256
— of which central	1 008
Analog channels
● Inputs	1 015
— of which central	248
● Outputs	1 015
— of which central	248
Hardware configuration
Number of expansion units, max.	3
Number of DP masters
● integrated	1
● via CP	4
Number of operable FMs and CPs (recommended)
● FM	8
● CP, PtP	8
● CP, LAN	6
Rack
● Racks, max.	4
● Modules per rack, max.	8; In rack 3 max. 7
Time of day
Clock
● Hardware clock (real-time)	Yes
● retentive and synchronizable	Yes
● Backup time	6 wk; At 40 °C ambient temperature
● Deviation per day, max.	10 s; Typ.: 2 s
● Behavior of the clock following POWER-ON	Clock continues running after POWER OFF
● Behavior of the clock following expiry of backup period	the clock continues at the time of day it had when power was switched off
Operating hours counter
● Number	1
● Number/Number range	0
● Range of values	0 to 2^31 hours (when using SFC 101)
● Granularity	1 h
● retentive	Yes; Must be restarted at each restart
Clock synchronization
● supported	Yes
● to MPI, master	Yes
● on MPI, device	Yes
● to DP, master	Yes; With DP slave only slave clock
● on DP, device	Yes
● in AS, master	Yes
● in AS, device	No
Digital inputs
Number of digital inputs	16
● of which inputs usable for technological functions	12
integrated channels (DI)	16
Input characteristic curve in accordance with IEC 61131, type 1	Yes
Number of simultaneously controllable inputs
horizontal installation
— up to 40 °C, max.	16
— up to 60 °C, max.	8
vertical installation
— up to 40 °C, max.	8
Input voltage
● Rated value (DC)	24 V
● for signal "0"	-3 to +5V
● for signal "1"	+15 to +30 V
Input current
● for signal "1", typ.	8 mA
Input delay (for rated value of input voltage)
for standard inputs
— parameterizable	Yes; 0.1 / 0.3 / 3 / 15 ms (You can reconfigure the input delay of the standard inputs during program runtime. Please note that under certain circumstances your newly set filter time may not be effective until the next filter cycle.)
— Rated value	3 ms
for technological functions
— at "0" to "1", max.	16 µs; Minimum pulse width/minimum pause between pulses at maximum counting frequency
Cable length
● shielded, max.	1 000 m; 100 m for technological functions
● unshielded, max.	600 m; for technological functions: No
for technological functions
— shielded, max.	100 m; at maximum count frequency
— unshielded, max.	not allowed
Digital outputs
Number of digital outputs	16
● of which high-speed outputs	4; Notice: You cannot connect the fast outputs of your CPU in parallel
integrated channels (DO)	16
Short-circuit protection	Yes; Clocked electronically
● Response threshold, typ.	1 A
Limitation of inductive shutdown voltage to	L+ (-48 V)
Controlling a digital input	Yes
Switching capacity of the outputs
● on lamp load, max.	5 W
Load resistance range
● lower limit	48 Ω
● upper limit	4 kΩ
Output voltage
● for signal "1", min.	L+ (-0.8 V)
Output current
● for signal "1" rated value	500 mA
● for signal "1" permissible range, min.	5 mA
● for signal "1" permissible range, max.	0.6 A
● for signal "1" minimum load current	5 mA
● for signal "0" residual current, max.	0.5 mA
Parallel switching of two outputs
● for uprating	No
● for redundant control of a load	Yes
Switching frequency
● with resistive load, max.	100 Hz
● with inductive load, max.	0.5 Hz
● on lamp load, max.	100 Hz
● of the pulse outputs, with resistive load, max.	2.5 kHz
Total current of the outputs (per group)
horizontal installation
— up to 40 °C, max.	3 A
— up to 60 °C, max.	2 A
vertical installation
— up to 40 °C, max.	2 A
Cable length
● shielded, max.	1 000 m
● unshielded, max.	600 m
Analog inputs
Number of analog inputs	0
integrated channels (AI)	0
Analog outputs
integrated channels (AO)	0
Encoder
Connectable encoders
● 2-wire sensor	Yes
— permissible quiescent current (2-wire sensor), max.	1.5 mA
Interfaces
Number of PROFINET interfaces	0
Number of RS 485 interfaces	2; MPI and PROFIBUS DP
Number of RS 422 interfaces	0
1. Interface
Interface type	Integrated RS 485 interface
Isolated	No
Interface types
● RS 485	Yes
● Output current of the interface, max.	200 mA
Protocols
● MPI	Yes
● PROFIBUS DP master	No
● PROFIBUS DP device	No
● Point-to-point connection	No
MPI
● Transmission rate, max.	187.5 kbit/s
Services
— PG/OP communication	Yes
— Routing	Yes
— Global data communication	Yes
— S7 basic communication	Yes
— S7 communication	Yes; Only server, configured on one side
— S7 communication, as client	No; but via CP and loadable FB
— S7 communication, as server	Yes
2. Interface
Interface type	Integrated RS 485 interface
Isolated	Yes
Interface types
● RS 485	Yes
● Output current of the interface, max.	200 mA
Protocols
● MPI	No
● PROFINET IO Controller	No
● PROFINET IO Device	No
● PROFINET CBA	No
● PROFIBUS DP master	Yes
● PROFIBUS DP device	Yes
PROFIBUS DP master
● Transmission rate, max.	12 Mbit/s
● max. number of DP devices	124
Services
— PG/OP communication	Yes
— Routing	Yes
— Global data communication	No
— S7 basic communication	Yes; I blocks only
— S7 communication	Yes; Yes (only server; connection configured at one end)
— S7 communication, as client	No
— S7 communication, as server	Yes
— Equidistance	Yes
— Isochronous mode	No
— SYNC/FREEZE	Yes
— activation/deactivation of DP devices	Yes
— max. number of DP devices that can be activated/deactivated at the same time	8
— Direct data exchange (slave-to-slave communication)	Yes; as subscriber
— DPV1	Yes
Address area
— Inputs, max.	2 kbyte
— Outputs, max.	2 kbyte
User data per DP device
— Inputs, max.	244 byte
— Outputs, max.	244 byte
PROFIBUS DP device
● GSD file	The latest GSD file is available on the Internet (http://www.siemens.com/profibus-gsd)
● Transmission rate, max.	12 Mbit/s
● automatic baud rate search	Yes; only with passive interface
● Address area, max.	32
● User data per address area, max.	32 byte
Services
— PG/OP communication	Yes
— Routing	Yes; Only with active interface
— Global data communication	No
— S7 basic communication	No
— S7 communication	Yes; Yes (only server; connection configured at one end)
— S7 communication, as client	No
— S7 communication, as server	Yes
— Direct data exchange (slave-to-slave communication)	Yes
— DPV1	No
Transfer memory
— Inputs	244 byte
— Outputs	244 byte
Protocols
PROFIsafe	No
Communication functions
PG/OP communication	Yes
Data record routing	Yes
Global data communication
● supported	Yes
● Number of GD loops, max.	8
● Number of GD packets, max.	8
● Number of GD packets, transmitter, max.	8
● Number of GD packets, receiver, max.	8
● Size of GD packets, max.	22 byte
● Size of GD packet (of which consistent), max.	22 byte
S7 basic communication
● supported	Yes
● User data per job, max.	76 byte
● User data per job (of which consistent), max.	76 byte; 76 bytes (with X_SEND or X_RCV); 64 bytes (with X_PUT or X_GET as server)
S7 communication
● supported	Yes
● as server	Yes
● as client	Yes; Via CP and loadable FB
● User data per job, max.	180 kbyte; With PUT/GET
● User data per job (of which consistent), max.	240 byte; as server
S5 compatible communication
● supported	Yes; via CP and loadable FC
Number of connections
● overall	8
● usable for PG communication	7
— reserved for PG communication	1
— adjustable for PG communication, min.	1
— adjustable for PG communication, max.	7
● usable for OP communication	7
— reserved for OP communication	1
— adjustable for OP communication, min.	1
— adjustable for OP communication, max.	7
● usable for S7 basic communication	4
— reserved for S7 basic communication	0
— adjustable for S7 basic communication, min.	0
— adjustable for S7 basic communication, max.	4
● usable for routing	4; max.
S7 message functions
Number of login stations for message functions, max.	8; Depending on the configured connections for PG/OP and S7 basic communication
Process diagnostic messages	Yes
simultaneously active Alarm_S blocks, max.	300
Test commissioning functions
Status block	Yes; Up to 2 simultaneously
Single step	Yes
Number of breakpoints	4
Status/control
● Status/control variable	Yes
● Variables	Inputs, outputs, memory bits, DB, times, counters
● Number of variables, max.	30
— of which status variables, max.	30
— of which control variables, max.	14
Forcing
● Forcing	Yes
● Forcing, variables	Inputs, outputs
● Number of variables, max.	10
Diagnostic buffer
● present	Yes
● Number of entries, max.	500
— adjustable	No
— of which powerfail-proof	100; Only the last 100 entries are retained
● Number of entries readable in RUN, max.	499
— adjustable	Yes; From 10 to 499
— preset	10
Service data
● can be read out	Yes
Interrupts/diagnostics/status information
Diagnostics indication LED
● Status indicator digital input (green)	Yes
● Status indicator digital output (green)	Yes
Integrated Functions
Counter
● Number of counters	3; See "Technological Functions" manual
● Counting frequency, max.	30 kHz
Frequency measurement	Yes
● Number of frequency meters	3; up to 30 kHz (see "Technological Functions" manual)
controlled positioning	No
integrated function blocks (closed-loop control)	Yes; PID controller (see "Technological Functions" manual)
PID controller	Yes
Number of pulse outputs	3; Pulse width modulation up to 2.5 kHz (see "Technological Functions" Manual)
Limit frequency (pulse)	2.5 kHz
Potential separation
Potential separation digital inputs
● Potential separation digital inputs	Yes
● between the channels	No
● between the channels and backplane bus	Yes
Potential separation digital outputs
● Potential separation digital outputs	Yes
● between the channels	Yes
● between the channels, in groups of	8
● between the channels and backplane bus	Yes
Isolation
Isolation tested with	600 V DC
Ambient conditions
Ambient temperature during operation
● min.	0 °C
● max.	60 °C
Configuration
Configuration software
● STEP 7	Yes; STEP 7 V5.5 + SP1 or higher or STEP 7 V5.3 + SP2 or higher with HSP 203
● STEP 7 Lite	No
Programming
● Command set	see instruction list
● Nesting levels	8
● System functions (SFC)	see instruction list
● System function blocks (SFB)	see instruction list
Programming language
— LAD	Yes
— FBD	Yes
— STL	Yes
— SCL	Yes
— CFC	Yes
— GRAPH	Yes
— HiGraph®	Yes
Know-how protection
● User program protection/password protection	Yes
● Block encryption	Yes; With S7 block Privacy
Dimensions
Width	80 mm
Height	125 mm
Depth	130 mm
Weights
Weight, approx.	500 g

Fault description	Possible solution
Why is the STOP LED on the 6ES7313-6CG04-0AB0 flashing slowly?	A slowly flashing STOP LED on an S7-300 CPU typically indicates that a memory reset (MRES) has been requested, for example after replacing the MMC or following an operating system update. Ensure that the MMC is correctly inserted, the power supply is stable, and the MRES procedure is performed according to Siemens specifications. Afterwards, the hardware configuration and user program must be downloaded again.
Why can't the CPU 313C-2 DP be found via MPI?	In many cases, the PG/PC interface settings, MPI address, or transmission rate do not match. First, set the PG/PC interface explicitly to MPI and then check under “Accessible Nodes” whether the CPU is visible. If the CPU still cannot be detected, inspect the MPI cable, bus connector, and the actual communication interface being used. In addition, the PROFIBUS DP interface can be tested as an alternative communication path.
Why are the BF and SF LEDs illuminated on the CPU 313C-2 DP?	In PROFIBUS configurations, BF (Bus Fault) usually indicates that a configured slave is not reachable or that an address assignment is incorrect. SF (System Fault) often appears as a secondary diagnostic message. Check the bus termination, slave addresses, wiring, slave power supplies, and the downloaded hardware configuration. Afterwards, evaluate the diagnostic buffer, as the CPU can store up to 500 diagnostic entries that provide detailed information about the cause of the fault.
Why are the integrated inputs and outputs of the CPU not responding?	On compact CPUs, the integrated I/O channels are part of the CPU itself. Therefore, first verify the 24 V load voltage (L+), the correct front connector, and the actual field wiring. If the input LEDs respond but the outputs do not switch, additionally check the signal states in a VAT (Variable Table) and review the group currents, short-circuit protection, and the application logic within OB1

Does the 6ES7313-6CG04-0AB0 require a Micro Memory Card and a front connector?

Yes. The CPU requires a SIMATIC Micro Memory Card (MMC) as load memory and a 40-pin front connector for operation. Without an MMC, the module is not fully operational in practical applications. This is important for procurement and maintenance because not only the CPU itself but also the required accessories must be available when ordering a replacement part.

Which software is required to configure this CPU?

Siemens specifies STEP 7 V5.5 + SP1 or STEP 7 V5.3 + SP2 with HSP 203 as suitable engineering environments for the CPU 313C-2 DP. For operators of older systems, this is a crucial consideration: before replacing the CPU, modifying the program, or commissioning the system, it should be verified that the existing engineering environment supports the required software version. This helps avoid delays during commissioning and service.

Does the CPU support PROFINET?

No. The 6ES7313-6CG04-0AB0 supports MPI and PROFIBUS DP, but it does not support PROFINET. The model is therefore clearly designed for traditional S7-300 and PROFIBUS architectures. If Ethernet-based communication or modern PROFINET topologies are required, the existing architecture must be supplemented with additional components or a planned migration to a newer controller platform should be considered.

Can the CPU operate as both a PROFIBUS DP master and a DP slave?

Yes. According to Siemens, the integrated DP interface supports both PROFIBUS DP master and PROFIBUS DP device (slave) operation. As a master, transmission rates of up to 12 Mbit/s are supported, and Siemens specifies support for up to 124 DP devices. This flexibility is particularly useful in existing installations, allowing the CPU to be integrated into both traditional master-slave architectures and more complex decentralised I/O systems.

What is the fastest solution if a machine using this CPU is down?

If production must resume as quickly as possible, an exchange unit is often the fastest option, as EICHLER specifies a delivery time of 1–3 days. Used and new units are also listed with 1–3 day availability, while repair services are typically specified at 2–5 days. For procurement and maintenance teams, this distinction is important because the most economical solution is not always the least expensive one, but often the one that restores operation in the shortest possible time.

Is there a direct successor or a recommended migration path?

Siemens positions the S7-1500 as the natural successor platform to the ageing S7-300 family. In the official migration guide, the 6ES7313-6CG04-0AB0 is mapped to a CPU 1511C. For plant operators, this means there is a clear modernisation path, but not a direct plug-and-play replacement within an existing control cabinet. If short-term availability is the priority, repair, exchange, or strategic spare-part stocking are often the better options. For medium- to long-term modernisation projects, however, a structured migration to the S7-1500 platform should be considered.