MVI56E-AFC / MVI69E-AFC ♦ Enhanced Liquid and Gas Flow Computer
Configuring Site Parameters
ControlLogix® and CompactLogix™
Setup and Configuration Guide
ProSoft Technology, Inc.
Page 37 of 151
Option
Description
Bit (packed 16 to a word)
Word (16-bit register)
Long (32-bit items as register pairs)
Long Remote (32-bit items as single registers)
Note: Long data type implements each data unit as one pair of 16-bit registers (words).
Each register contains two bytes. Long remote data type implements each data unit as
one 32-bit register. Each register contains four bytes. The proper choice depends on the
remote slave’s Modbus implementation.
Hide Primary Slave
When checked, protects the Primary Modbus Slave from any read or write
command from a Modbus master device. In this case, you could also
remap the register from the Primary Slave to the Virtual Slave protecting
each register from write commands (refer to the Primary & Virtual Modbus
Slaves Configuration section).
Swap Modbus Bytes
If checked, the bytes transferred by a Modbus master device will be
swapped.
Swap Modbus
Words
If checked, the words transferred by a Modbus master device will be
swapped. This setting only applies to double-register data items (floating
point and long integer).
Disable Pass-thru
The Modbus pass-through feature allows you to configure a Modbus
Pass-through region in the virtual slave (
Project
>
Site Configuration
).
After the module receives a holding register write command (Modbus
functions 6 or 16) or a bit write command (Modbus functions 5 or 15), it
generates a pass-through block to be sent to the processor containing the
Modbus command data. You can define a word pass-through region for
words or bits.
Note: You must enable the Virtual Slave by configuring a Modbus address
greater than 0 (
Project
>
Site Configuration
).
You can control which communication parts will support the pass-through
(
Project
>
Site Configuration
>
Port X
button).
This feature requires ladder logic to read the pass-through block from the
module to the processor. Refer to the Ladder Logic section in the
AFC
Reference Guide
for more information about the pass-through feature.
Summary of Contents for MVI56E-AFC
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