Outputs - Siemens Simatic Manual

Fail-safe function blocks for storage and retrieval machines
POS_STARTUP_TOL
POS_DISC_WINDOW
POS_SETPOINT
V_DISC_WINDOW
V_SYNC_INTERVALL
V_MAX
V_STANDSTILL
SET
SYNC
ACK
3.2.2.2

Outputs

Name
SAFE_POS
POS_VALID
REFERENCED
SAFE_V
V_VALID
STANDSTILL
MOVES_POSITIVE
MOVES_NEGATIVE
ACK_REQ
ERROR
S7-Distributed Safety/SIMATIC Safety - fail-safe function blocks for storage and retrieval machines
Max. permissible deviation when powering up [SLU]
When starting, the value of the second encoder used to
Int check the plausibility must not deviate more than this val-
ue from encoder 1
POS_STARTUP_TOL >= 0
Max. permissible encoder deviation in operation [SLU]
The value of the second encoder used to check the plau-
Int sibility must not deviate more than this value from encoder
1
POS_DISC_WINDOW >= 0
Reference position [SLU]
With a pos. edge at SET, POS1 as well as the redundant
Int
encoder (POS2 or POS_SI; depending on POS_CONFIG
Bit 0) are synchronized at this position
Tolerance window, velocity monitoring
Max. permissible increase of the encoder deviation [SLU]
Int
within V_SYNC_INTERVALL for velocity monitoring
V_DISC_WINDOW >= 0
Tracking interval, velocity monitoring [ms]
Int
V_SYNC_INTERVALL > 0
Int Max. permissible velocity [SLU/mm]
Int Velocity limit for standstill detection [SLU/min]
Referencing
Bool 0 -> 1: offset of encoders regarding calibrate
POS_SETPOINT
Synchronizing
Bool 0 -> 1: encoder used to check the plausibility is synchro-
nized with encoder 1
Acknowledging
If a fault occurs in normal operation, then this must be
Bool reset using ACK before the system can be restarted.
The acknowledgment is only realized with a positive edge
at ACK, and has no effect in normal operation.
Data type Description
Safety-related position actual value [SLU]
Int Safety-related position for all additional blocks in this block
package
Status, position actual value
Bool
1: SAFE_POS was generated in a safety-related fashion
Status, absolute reference
Bool 1: Both encoders are referenced, and the discrepancy
between the two encoders is within the tolerance window
Safety-related velocity actual value [SLU/min]
Int Safety-related velocity for all additional blocks in this block
package
Status, velocity actual value
Bool
1: SAFE_V was generated in a safety-related fashion
Zero speed detection
Bool
1: Actual velocity less than V_STANDSTILL
Bool Motion in the positive direction
Motion in the negative direction
Bool
Acknowledgment request
If a fault has occurred, but is no longer active, and can
Bool
therefore be acknowledged, then this block indicates this
using a 1 signal at ACK_REQ.
Error
This output is set if the block has been incorrectly parame-
Bool
terized – or if the block identifies a potentially dangerous
combination of input signals in operation. The output re-
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