ProSoft Technology PTQ-AFC - Manual (Page 174)

Backplane Communication PTQ-AFC ♦ Modicon Quantum Platform
User Manual Liquid and Gas Flow Computer for Hydrocarbon Products
Page 174 of 259 ProSoft Technology, Inc.
June 23, 2011
9.1.3 Wallclock Block
The Wallclock block can be used by the processor to set or read the Wallclock
information from the module. The Supervisory block contains command registers
to initiate a Wallclock transaction.
Offset Description Comments
0 Year
1 Month
2 Day
3 Hour
4 Minute
5 Second
9.1.4 Modbus Gateway Block
The Modbus Gateway Block allows the processor to access the internal Modbus
database (Primary or Virtual) in the PTQ-AFC. This block is optional, and must
be defined only if the application intends to use this feature.
To initiate a Modbus Gateway transaction, set up the transaction before issuing
the signal. The processor should set the Issue Gateway Transaction register
(offset 2 from Supervisory Output block) to 1. After the gateway transaction is
completed the module will reset this register.
Offset Description Comments
0 Slave Selection, register bank, direction
1 Register address
2 Number of registers
3 Modbus exception code
4 to 125 Data
The Modbus exception code can assume one of the following values:
1: Illegal Function
2: Illegal Address
3: Illegal Data