ProSoft Technology MVI56-AFC - Manual (Page 193)

MVI56-AFC ♦ ControlLogix Platform MVI56-AFC Backplane Communication
Liquid and Gas Flow Computer User Manual
ProSoft Technology, Inc. Page 193 of 316
February 25, 2011
Description
This block returns an archive record to the PLC, selected according to the criteria
in the Output block. Archive fetch may be controlled through the use of the
"ignore output" bit (bit 8) of the block id; the "skip input" bit (bit 9) has no function
and is ignored.
Output block format:
Word Description
1 Archive file select; 0 daily, 1 hourly
2 Age of requested archive
3 to 41 [ignored]
Input block format:
Word Description
1 Error bitmap:
Bit 0: Archive file selection invalid
Bit 1: Age outside configured file size
2 to 41 Archive record data (up to 40 words, or 0 on error
11.2.11 Function Block Definition - 16/17/18/19: Modbus Gateway
Read
Output Function Block ID
Function Code 16: Read Modbus Registers from the PRIMARY Slave
HOLDING register bank.
Function Code 17: Read Modbus Registers from the VIRTUAL Slave HOLDING
register bank.