Hi,
I have 2 Serial Interface M-Series cards attached to DCS Controller on site. I have below concerns:
Appreciated your input on it.
Let us build success,
Zohaib Jahan
For M-Series wiring of serial cards go to Books On-Line, expand Hardware Installation, expand DeltaV M-series Hardware Installation and Reference, expand Interface Specifications, and select Serial Card, 2 Ports, RS232/RS485. This will have the terminal definitions for all of the supported connection types.
Configuration help can be found in Books On-line as well under Configuration, I/O Configuration , Serial Devices and the DeltaV system.
The register numbers you see are defined by the PLC data type you are selecting and the PLC register offset. Input register type sets a PLC base register address of 30001, to read starting at 33072 you would then need a PLC register offset of 3071 configured on the PLC tab of the dataset configuration.
Similarly with Holding registers (start at 40001) and coils (start at 1).
With the base Modbus driver you are limited to addresses no higher than 9999 relative to the PLC base register address. There are other drivers available that will allow you to address higher offsets than 9999.
In reply to Scott Thompson: