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This article discusses how to control an ION module and in turn an ION meter. This includes resetting, triggering and changing state of a module registers.
Applies to all ION meters (7330, 7650RTU, 8600, ...).
Modbus Tester or any other Modbus program or device with write capability.
Refer to Modbus Map for ION Meters document that lists each module (ION register) and its corresponding Modbus register based on the ION module number.
Controlling an ION meter by sending commands using Modbus protocol. The commands can be written to the following modules:
For demonstration purposes, a value will be written to External Numeric 1 and 4 modules. Writing to External Boolean and External Pulse modules follow the same procedure.
1. Determine Modbus addresses by referring to Modbus Map for ION Meters document