127
ICC
Write Enable and Function Code Selection
Applies to holding register and coil status types only.
Check
Write
to enable
writing (when values encompassed by this service object change in the gateway’s
database, these changes will be written down to the targeted slave). When writes
are enabled, the desired write
Function Code
can be selected in the drop-down
box.
Group Multiple Writes
Applies to holding register and coil status types with writes enabled only.
This
checkbox is used to indicate whether the gateway should group writes to multiple
holding registers or coils into one packet, or send separate write packets for each
one. Check this box to enable the grouping of multiple writes into one write
packet.
For holding register types:
note that this feature is only available with function
code
16 (Preset Multiple Registers)
.
For coil status types:
note that this feature is always enabled with function code
15 (Force Multiple Coils)
.
Service Object Status
If it is desired to reflect the status of this service object, check the
Reflect Status
checkbox and enter a database
address
between 0 and 4080 (0x0 – 0xFF0) at
which to store the status information. For more information on reflecting the
status of service objects, refer to section 8.5.2.
8.8.11.2.1 32-Bit Extension Options
Applies to register types only.
If the target registers are associated with the
Enron/Daniel extension to the Modbus specification, or are represented by 32-bit
values, check the
Enable Enron/Daniel
checkbox to enable the 32-bit extension
option. The following describes each of the extension options:
Floating Point
Enable
Floating Point
if the transmitted values are encoded in IEEE 754 floating
point format.
Big Endian
Enable
Big Endian
if the transmitted values are encoded in big-endian, 16-bit
word order, i.e. the most significant 16-bit word is before the least significant 16-
bit word.
