OK. That was easy. Lightly tested beta:
For Ignition v8.1: v1.1.12.250081649
Adds three address modifiers, "MI" for Mod10 size 2, "M" for Mod10 size 3, and "ML" for Mod10 size 4. Not yet in the user manual.
For the OP, the OPC Item Path would likely be [device]1.HRML1700
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FWIW:
Gateway/src/com/automation_pros/modbus/address/ModbusAddress.java | 8 ++++++-
Gateway/src/com/automation_pros/modbus/address/ModbusNumericAddress.java | 4 ++++
Gateway/src/com/automation_pros/modbus/driver/GenericModbusDriver.java | 4 ++++
Gateway/src/com/automation_pros/modbus/handlers/Mod10Handler.java | 121 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 136 insertions(+), 1 deletion(-)
Edit: The beta has been replaced with a new formal release, with this data type's OPC Item Path format now documented.