Instruction Manual

Logic Functions - Book 1
MODBUS LIST BLOCK
3-54
Millisecond Time Modbus Register Value Remarks
00
100 10
10000 1000
100000 10000
600000 60000 10 minutes worth
655350 65535 out of range indication
>655350 65535 out of range indication
The display that is used to configure the Modbus list block is shown in Figure 3-17.
Up to 99
attributes can be defined through the configurator for one Modbus list block.
Figure 3-17. Modbus List Block (ML), Edit Display, page 2
3.7.1 Modbus List Block Operation
Execution of a Modbus List block is distributed over all group scan periods and is therefore not
loop block related. The data identified by the Modbus List is collected, as the various groups
in an input buffer generate it. Therefore, when the Modbus Slave Communication block
processes a Modbus Read message, it gets a consistent set of data from this list’s input
buffer. Data is always collected, regardless of quality.