S800 Warmstart - ABB 800xA Operation

Section 7 I/O Displays
Value
Diagnostics

S800 Warmstart

Actions Upon Startup
Upon startup, outputs to all devices are disabled. The database is downloaded with
each CCF loop output FCM in its initial output mode and each device loop holding
its initial command. A period of time is allowed for each S800 module to log into
the system. As each module is recognized, its outputs are read. If configured for
warmstart, the corresponding CCF loop output FCM for each output channel on the
module is placed in the MANUAL mode and its result is synchronized with the field
output value in the module memory. The action taken by a device loop configured
for warmstart depends on whether there are inputs to the device. If there are inputs
to the device, the DEV_CMND parameter is adjusted to command the device to
assume the existing field state. If there are no inputs, the DEV_CMND parameter is
set to the INIT_CMND (NO COMMAND). Finally, the automatic transfer of
outputs to the S800 module is enabled.
Actions On Module Communication
As a module logs out, a diagnostic message Block nnnn has logged out is sent and
the associated data quality goes BAD. As a result, FCMs may take their configured
"action on output error" and the automatic transfer of outputs to the module is
disabled. As a module logs in, output values are read from the module. If configured
for warmstart, the corresponding CCF output FCM or device loop for each channel
on the module is warm started. That is, the output FCM is placed in the MANUAL
mode, and the output value from the module is written to its result attribute. For the
warm started device loop, its DEV_CMND attribute is set to NO COMMAND.
Finally, the automatic transfer of outputs to the S800 module is enabled.
3BUR002418-600 A
The actual value of the input from the process or the output value
sent to the process.
For an output field, you can change the value of an output channel
by selecting it and entering a value. The loop needs to be warm-
started from the FCM display.
Not used.
See the S800 I/O instruction for error message information.
S800 Warmstart
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