Additional Functions; Startup Response; Time-Related Characteristics; Bumpless Changeover - Siemens SIMOCODE DP Programming And Operating Manual

SIMO_CHN Function
4.1 Description
For a detailed overview of how the various faults are acknowledged, please refer to the
SIMOCODE-DP manual, chapter 5.2, p. 5-4.
4.1.15

Additional Functions

This block provides two additional outputs QADD_F1 and QADD_F2 which can be controlled and
monitored. Operator control is through inputs ADDF1 and ADDF2, and operator enabling is
performed through the two inputs ADDF1_EN and ADDF2_EN (QADDF1OP and QADDF2OP).
These additional functions do not affect the internal block functions, and can be used for
controlling any of the binary signals.
4.1.16

Startup Response

After CPU startup (restart), the current statuses for LOCAL/REMOTE, MANUAL/AUTO, MANUAL
OPERATOR/MANUAL LINKED are retained. Commands are not output again. Depending on the
configured SIMOCODE-DP error response, a CPU STOP either causes a SIMOCODE-DP fault
(default setting), or (if "response PLC-CPU fault: retain status" is set) causes the current mode
status to be retained.
After startup, the number of cycles configured in the RUNUPCYC block I/O are inhibited.
4.1.17

Time-related Characteristics

The block must be called through a watchdog interrupt OB. The block sampling time is set in
parameter SAMPLE_T.
4.1.18

Bumpless Changeover

A command is reset in the block if the associated check-back signal is present. Consequently,
operating inputs ON1_OP, OFF_OP, and ON2_OP do not have to be tracked.
However, mode selections REMON_OP, AUTON_OP, and MANON_OP are always tracked in the
active settings.
4.1.19

Error Handling

For arithmetic program errors, ENO=0 or QERR=1 are set.
4.1.20

Messages

The SIMO_CHN block uses the Alarm_8P block for generating messages.
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SIMOCODE DP PCS 7 Library Migration (Legacy) - V9.1 SP2
Programming and Operating Manual, 11/2022, A5E51265657002A/RS-AC/003