Elster GmbH
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EnCal 3000 Quad– Hardware Manual
22/06/2017
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4.4
ModBus Communication
The picture below shows the ModBus Configuration screen for the EnCal 3000 Quad (see also Software
Manual)
fig. 4-4 ModBus Configuration Screen
The ModBus registers are user configurable:
fig. 4-5 ModBus Register Details
Register Type: Either Read Only (R) or Read/Write (R/W), and either bit (Status) or register size
Register #:
User selectable. For the Instromet protocol be aware of the following restrictions:
0
– 4999 :
2 bytes per Registers
5000
– 6999: 4 bytes Integers
7000
– higher: 4 bytes Floating Point
The Modicon protocol always uses 4 registers
Data Type:
Bit when Status is defined, Integer (16 bit or 32 bit) or Float when Register is defined
Parameter ID: Instruction set which is available in EnCal 3000 Quad.
Channel:
This column is reserved to define channel # or stream #, depending on the type of
Parameter ID defined
Peak #:
Component number, if applicable
For further details concerning the Modbus communication please refer to the Software Manual of RGC 3000.
