User Manual

Section 6 - Communication
I. Page 94 1/06/2012 REV 1.10.2
The following tables show the mapping of the recorder parameters into Modbus registers. Knowledge of these
Modbus register assignments is only needed to make use of third party communications software. Both
registers – high and low, must be accessed together to ensure valid data. The data is Modbus default byte
order and the registers DO NOT use zero byte addressing. Data encoding is first word low (32 bit data).
Table 6.3.2.2 Holding Registers 4xxx (Use Function 3 to Access)
32 Bits Modicon
TM
Format Floating Point
Writing to these registers has no effect
Register #
FUNCTION AND STATE
Register #
FUNCTION AND STATE
4361
Point 1 Data Low Word
4379
Point 10 Data Low Word
4362
Point 1 Data High Word
4380
Point 10 Data High Word
4363
Point 2 Data Low Word
4381
Point 11 Data Low Word
4364
Point 2 Data High Word
4382
Point 11 Data High Word
4365
Point 3 Data Low Word
4383
Point 12 Data Low Word
4366
Point 3 Data High Word
4384
Point 12 Data High Word
4367
Point 4 Data Low Word
4385
Point 13 Data Low Word
4368
Point 4 Data High Word
4386
Point 13 Data High Word
4369
Point 5 Data Low Word
4387
Point 14 Data Low Word
4370
Point 5 Data High Word
4388
Point 14 Data High Word
4371
Point 6 Data Low Word
4389
Point 15 Data Low Word
4372
Point 6 Data High Word
4390
Point 15 Data High Word
4373
Point 7 Data Low Word
4391
Point 16 Data Low Word
4374
Point 7 Data High Word
4392
Point 16 Data High Word
4375
Point 8 Data Low Word
4393
Point 17 Data Low Word
4376
Point 8 Data High Word
4394
Point 17 Data High Word
4377
Point 9 Data Low Word
4395
Point 18 Data Low Word
4378
Point 9 Data High Word
4396
Point 18 Data High Word
16 bit Integer registers accessible by Modbus RTU Serial only are available – contact factory for detail.