ProSoft Technology MVI56-LTQ - Manual (Page 66)

Reference MVI56-LTQ ♦ ControlLogix Platform
User Manual Limitorque Valve Actuator Master Communication Module
Page 66 of 98 ProSoft Technology, Inc.
August 30, 2010
Command control blocks are special blocks used to control the module or
request special data from the module. The current version of the software
supports two command control blocks; warm boot and cold boot.
Command Control Blocks
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.
The block is commonly sent to the module any time configuration modifications
are made in the controller tags data area. This causes the module to read the
new configuration and restart. The following table shows this structure:
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 following table describes the
format of the control block.
Offset Description Length
0 9999 1
1 to 247 Spare 247