Technical data

If any of the DP slaves relevant to the control command job are not in the
cyclic data transfer phase with the CPs when the job field is transferred, the
job is acknowledged negatively when it is transferred to the CP or may be
deactivated later.
A cyclic global control job that only deactivates the mode Sync and /or
Freeze is converted to a cyclic control job. The requirement for this is a
Group ID other than "0".
Checking the cyclic control command job
The cyclic transmission of global control commands can be monitored using
the group status bit of the ANZW HDB A-NR: 202 (DP station list).
The bit has the following significance:
bit 10 = "1" Global_Control command is sent cyclically.
"0" The cyclic transmission of Global_Control commands
is not active (has been deactivated).
Here, there are two different situations:
a) no Global_Control command was sent with the
job type cyclic transmission.
b) at least one of the DP slave stations relevant for the
job is no longer in the cyclic data transfer phase
with the CP.
☞
The cyclic transmission of Global_Control and control
commands must be activated again by the PLC.
Distributed I/Os (DP) B89060/02
Volume 1 11 - 70