SIEMENS 6ES5266-8MA11
- EICHLER-art.no.: K0117450
- EAN: 662643036060
Product description
SIMATIC S5, POSITIONING MODE IP266 FOR POSITION-CONTROLLED POSITIONING FOR SMALL CONTROL DEVICES S5-90U-95U-100U, ET 200U
Services for SIEMENS 6ES5266-8MA11
SIEMENS |
6ES5266-8MA11 –
additional product information
| Delivery information | |||
|---|---|---|---|
| Export identifier | AL: ECCN: | ||
| Net weight | 0.475 | ||
| Quantity | 1 Stück | ||
| Packaging quantity | 1 | ||
| Additional product information | |||
|---|---|---|---|
| Product status | EOP: 2004-10-01 | ||
| EAN | 662643036060 | ||
| UPC | / | ||
| Static lot number | 85389091 | ||
| List indicator | / | ||
| Product group | 4234 | ||
| Country of origin | DE | ||
| Compliance with the substance restrictions according to RoHS directive | Since: / | ||
| Product classifications | Version | Classification | |
|---|---|---|---|
| eClass | 4 | / | |
| eClass | 5.1 | / | |
| eClass | 6.0 | / | |
| ETIM | 3 | / | |
| ETIM | 4 | / | |
| ETIM | 5 | / | |
What is 6ES5266-8MA11 and where is it used?
The 6ES5266-8MA11 is the SIMATIC S5 IP266 positioning module from Siemens for closed-loop position control applications in the SIMATIC S5 environment. Siemens assigns the module to the S5-90U, S5-95U, S5-100U and ET 200U systems. In the Siemens manual, the IP266 is described as an intelligent module that independently manages the complete positioning process, controls servo motors via a power stage and relieves the CPU of time-critical motion control tasks. It can be used with CPU 100 (6ES5 100-8MA02) as well as CPU 102 and CPU 103. Typical applications include existing machines with linear or rotary axes that require defined motion profiles, homing routines and repeatable target positions.
Overview of the key technical specifications and what they mean
For maintenance and procurement, five characteristics are particularly important. The IP266 features an analogue output of ±10 V to provide the speed setpoint for the connected power stage. It processes incremental encoders with two quadrature tracks offset by 90 degrees and an additional reference pulse. Supported encoder types include 5 V differential encoders up to 500 kHz with 30 m shielded cable lengths, as well as 24 V encoders up to 100 kHz at 25 m or 25 kHz at 100 m. The module also provides 5 digital inputs and 3 digital outputs. The positioning range extends to ±32767.999 mm / 0.1 inch / degrees. In practice, this means the module is suitable for precise motion control tasks in legacy S5 installations but requires reliable encoder signals, correct parameterisation and proper wiring.
Product status, life-cycle status and obsolescence
The 6ES5266-8MA11 is listed with EOP (End of Production) status dated 2004-10-01. In the reviewed Siemens product information, the module is also classified as a spare part within the product life cycle. Siemens officially announced the end of the SIMATIC S5 product life cycle on 30 September 2020, and since 1 October 2020, spare parts and repair services for S5 systems have no longer been available directly from Siemens. For operators, this means the module is clearly obsolete but remains relevant as a spare-part, exchange or repair item within the secondary market. No Siemens source reviewed explicitly identifies a direct, fully compatible successor to the 6ES5266-8MA11.
Available EICHLER services and when they are relevant
For the 6ES5266-8MA11, EICHLER offers repair, exchange, used units and new units on request. Repair is specified with a turnaround time of 2–5 days and includes technical cleaning, preventive maintenance, comprehensive functional testing and a minimum 24-month warranty. This option is particularly valuable when an existing S5-controlled axis must be returned to operation quickly while maintaining the original machine logic and configuration. Exchange is attractive when minimising downtime is more important than waiting for the original module to be repaired. Used and new units on request support the creation of strategic spare-part inventories. Since Siemens has ended the S5 life cycle, these service options play an important role in maintaining the long-term availability of legacy systems despite increasing obsolescence.
| Fault description | Possible solution |
|---|---|
| Why does the IP266 report F02 "Wrong resolution"? | Check the machine data for resolution, unit of measurement and encoder parameters. Siemens specifies a valid resolution range of 0.1 to 99.9, calculated from the travel distance per encoder revolution divided by the number of encoder pulses per revolution. If these values are incorrect, the IP266 cannot calculate the actual position correctly. After correcting the parameters, transfer the machine data again to RAM or EEPROM and repeat the test run. |
| Why does COM 266 report F53 or F54 when communicating with the IP266? | Siemens recommends first checking the power supply and cabling. Typical causes include an incorrectly connected cable or a module without power. There is also a documented case of an F53 error caused by a faulty RS232/TTY connection. Therefore, verify the supply voltage, correct PG port, connectors and cable type before attempting the transfer again. |
| Why does the IP266 position control loop abort, or why does the following error increase significantly? | Siemens identifies several primary causes: the encoder is disconnected or defective, the analogue output is not wired, the power stage is not enabled or switched on, or the axis is mechanically blocked. The manual also explains that the following error increases when the actual position value no longer changes during movement, for example due to an encoder fault or a disabled power stage. Encoder signals, power-stage enable signals, analogue wiring and the mechanical drive train should therefore be checked systematically. |
| Why does the IP266 lose the reference point or report FB8? | Siemens notes that an emergency stop of the servo motor can cause a following-error fault and additionally trigger FB8 in the position control loop. In such cases, the reference point may also be lost. After such an event, the braking behaviour, power stage, encoder coupling and homing system should be checked. The axis must then be re-referenced before automatic operation is resumed. |
| Why does F61 "Incorrect hardware limit switch polarity" appear? | According to Siemens, only two settings are permitted for the hardware limit-switch polarity: 0 = NO contact (positive) or 1 = NC contact (negative). If this parameter is configured incorrectly, the IP266 detects an invalid limit-switch logic. Therefore, check both the parameter settings and the actual wiring. For rotary axes without connected hardware limit switches, the manual specifies that NO contacts must be configured. |
Is 6ES5266-8MA11 still available from Siemens?
No. The module is no longer part of the active Siemens product portfolio. The EICHLER product page lists an EOP (End of Production) date of 2004-10-01, and Siemens officially announced the end of the SIMATIC S5 product life cycle on 30 September 2020. Since 1 October 2020, spare parts and repair services for S5 systems have generally no longer been available directly from Siemens. For ongoing operation, procurement is therefore typically handled through specialist suppliers, available stock, exchange services and repair providers.
Which controllers and CPUs are compatible with the 6ES5266-8MA11?
The IP266 is designed for S5-90U, S5-95U, S5-100U and ET 200U systems. The Siemens manual further specifies that it can only be used with CPU 100 when the controller is the 6ES5 100-8MA02 version, while CPU 102 and CPU 103 are supported without this restriction. When evaluating spare-part compatibility, it is therefore important to verify not only the module part number but also the installed controller platform and the exact CPU version.
What encoder and signal technology does the IP266 require?
The module expects an incremental encoder with two quadrature signals (A/B) offset by 90 degrees and a reference pulse. Both 5 V differential encoders and 24 V single-ended encoders are supported. In addition, the IP266 provides encoder power supplies of 5 V / 350 mA or 24 V / 350 mA. For reliable operation, correct encoder resolution, permissible signal frequency and appropriate cable lengths are essential, as these directly influence position feedback quality and positioning accuracy.
What does the ±10 V analogue output mean in practice?
The ±10 V output is the IP266's setpoint output to the drive power stage, not a direct motor connection. Siemens specifies that this output provides the speed or control reference signal for the drive system. In practice, this means that if the wiring between the IP266 and the power stage is faulty, or if the power stage is not enabled, the axis will not move correctly even though the PLC and positioning module are operating normally. For this reason, checking the analogue control path is one of the first diagnostic steps when troubleshooting axis-related problems.
Is there a direct Siemens successor to the 6ES5266-8MA11?
No Siemens documentation reviewed identifies a direct, fully compatible successor to the 6ES5266-8MA11. Siemens classifies the module as a spare-part product within the product life cycle and generally recommends migration from SIMATIC S5 to SIMATIC S7, particularly towards the S7-1500 platform. However, this represents a migration project rather than a plug-compatible 1:1 replacement for the IP266.
When is repair more appropriate than replacement or purchasing another unit?
Repair is often the preferred option when the existing axis configuration is proven, the module appears repairable and the machine should continue operating with its current solution. At EICHLER, repair is specified with a turnaround time of 2–5 days and includes technical cleaning, preventive maintenance, functional testing and a minimum 24-month warranty. Exchange is generally the better choice when downtime costs exceed the waiting time for repair. Used or new-on-request units are particularly useful for strategic spare-part stockholding and long-term obsolescence management.
