ProSoft Technology MVI94-MCM-MHI - Manual (Page 81)

MVI94-MCM ♦ Flex I/O Platform Reference
Serial Communications Modbus Communication Module User Manual
ProSoft Technology, Inc. Page 81 of 109
March 29, 2011
Pass-Through Block 9956, 9957, 9958, or 9960 from Module to Processor
Word Description
0 This word contains the block 9956 to 9958 representing the type of pass-through data
being transferred.
1 This word contains the number of data registers being transferred.
2 This word contains the destination address for the data.
3 This word contains the register data. - For 9960: AND Mask
4 This word contains the second register data when floating-point data is being
transferred. - For 9960: OR Mask
5 Reserved
6 Reserved
Warm Boot Block (9998)
This block does not contain any data. When the processor places a value of
9998 in word 0 of the output image, the module will perform a warm-start. This
involves clearing the configuration and all program status data. Finally, the
program will load in the configuration information from the Flash ROM and begin
running. There is no positive response to this message other than the status data
being set to zero and the block polling starting over.
Cold Boot Block (9999)
This block does not contain any data. When the processor places a value of
9999 in word 0 of the output image, the module will perform a hardware restart.
This will cause the module to reboot and reload the program. There is no positive
response to this message other than the status data being set to zero and the
block polling starting over.