Ethernet I/O Modules
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w
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d
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D
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?
?
A:
If your software shows wrong value of DI Counter for the PETL/tET/tPET series module, verify that
the related parameters on your software are correct, as follows:
The DI Counter records data as 32-bit value and is transmitted as two 16-bit registers. Consequently,
the register address has an offset of 2, i.e., the address of the second channel will be at
starting-a 2, and so on.
Example: Reading the values for 6 DI Counters on a tPET-P6 module.
Using the API of nModbus:
Ushort[]
counter = master.
ReadInputRegisters
(1,
0x10
,
12
);
For more detailed information about the starting address, channels, and declared length
parameters, etc., refer to the
section 6.3 Modbus Register Table
DI Counter
Register
16-bit
………..
16-bit
16-bit
16-bit
16-bit
16-bit
32-bit
32-bit
32-bit
0
1
2
3
4
5
D/I Channel 0
D/I Channel 0
D/I Channel 0
………..
………..
Starting Address
6 channels * 2 registers =
12 registers
Declare 16-bit
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.1, Sep. 2014, Page: 114
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