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Reference MVI56-CAS ♦ ControlLogix Platform
Teledyne CA Slave Module
ProSoft Technology, Inc. Page 55 of 86
December 26, 2007
Warm Boot
This block is sent from the ControlLogix processor to the module (output image)
when the module is required to perform a warm-boot (software reset) operation.
This block is commonly sent to the module any time configuration data
modifications are made in the controller tags data area. This will force the module
to read the new configuration information and to restart. The structure of the
control block is shown below:
Offset Description Length
0 9998 1
1 to 247 Spare 247
Cold Boot
This block is sent from the ControlLogix processor to the module (output image)
when the module is required to perform the cold boot (hardware reset) operation.
This block is sent to the module when a hardware problem is detected by the
ladder logic that requires a hardware reset. The structure of the control block is
shown in the following table:
Offset Description Length
0 9999 1
1 to 247 Spare 247
5.2.5 Pass-Through Control Blocks
The module will pass blocks with identification codes of 9991, 9992 and 9994 to
the processor for each received write command. Ladder logic must handle the
receipt of all TCA write functions to the processor and to respond as expected to
commands issued by the remote TCA device. The structure of the pass-through
control block is shown in the following table:
Offset Description Length
0 0 1
1 9991, 9992, or 9994 1
2 Number of bytes in message 1
3 Write Address 1 1
4 Write Address 2 1
5 to 248 Message Received 244
249 9991, 9992, or 9994 1
The ladder logic will be responsible for parsing and copying the received
message and performing the proper control operation as expected by the master
device. The processor must then respond to the pass-through control block with
a write block with the following format.
Offset Description Length
0 9991, 9992, or 9994 1
1 to 247 Spare 247