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selection and start byte). If parameter P701 = FALSE, the status of the reqControl input

parameter is not evaluated.

Note

The "Message frame substitution" function takes immediate effect when p701 = 1.

Make sure that it is possible to shut down the drive at any time using an EMERGENCY STOP.

For additional information, refer to the SIMODRIVE POSMO A user manual,

Distributed

Positioning Motor on PROFIBUS DP

Task integration (call)

The _POSMOA_control function block must be called cyclically in the BackgroundTask or in

the TimerInterruptTask. Calling in the SystemInterruptTask is not permitted. Calling the

function block in synchronous tasks (e.g. IPOSynchronousTask) is not recommended for

runtime reasons.

Note

The functionality of the _POSMOA_control FB has been expanded with V4.1. To enable you

to use the newly implemented functions, you must add the new input parameters when calling

the _POSMOA_control FB.

If you want to work with the previous functions (< V4.1), you can leave out the new input

parameters with a detailed notation when calling the FB.

Error messages, faults and warnings

The TRUE value at the error output parameter indicates a parameterization error. The

errorID output parameter provides more detailed information on the parameterization error that

has occurred or has been signaled by POSMO A. Parameterization errors do not need to be

acknowledged. Changed parameters (e.g. ramp-up time) can be transferred again.

Faults on the POSMO A are signaled in the driveError output parameter with the value

TRUE. The reason for the fault can be read out in the driveErrorId output parameter (value

corresponds to P947). Drive faults have to be acknowledged and must be reset in the

resetError input parameter with the rising edge!

Warnings pending from the POSMO A and the associated information are output in the

driveWarning, driveWarnId (value corresponds to P953) and driveWarnInfo (value

corresponds to P954) output parameters.

Function blocks

3.2 Function block _POSMOA_control

Supplement to SIMODRIVE POSMO A Positioning Motor

Function Manual, 01/2015 23

Siemens SIMODRIVE POSMO A Function Manual

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