Nexen RSTC1000 964523 - Manual (Page 7)

4 FORM NO. L-21208-C-0908
RSTC1000 MODBUS REGISTERS
All values written to or read from the RSTC1000 must be in Imperial units. Conversion of values from other units of
measure are done within the HMI or PLC.
The following Modbus registers are numbered per the Modbus standard. Many PLCs use an alternate numbering
scheme and the Modbus register numbers can be converted to the PLC numbering scheme by adding 40,001 to each
Modbus register number.
Common Defi nitions and Abbreviations:
lsb: least signifi cant byte
msb: most signifi cant byte
lsw: least signifi cant word
msw: most signifi cant word
byte: 8 bits, 0-255 range
word: 2 bytes, 0-65535 range
P
RODUCT
I
NFORMATION
1 – 4: Product Name Sent as ASCII values, read only.
Example:
RSTC1000
Register 1: R (msb), S (lsb)
Register 2: T (msb), C (lsb)
Register 3: 1 (msb), 0 (lsb)
Register 4: 0 (msb), 0 (lsb)
6 – 7: Product Number Sent as long integer, read only.
Example:
964523
Register 6: 14 (msw)
Register 7: 47019 (lsw)
964523 = (14 * 65536) + 47019
8 – 9: Serial Number Sent as long integer, read only.
Example:
1234567
Register 8: 18 (msw)
Register 9: 54919 (lsw)
1234567 = (18 * 65536) + 54919
10 – 11: Software Part Number Sent as long integer, read only.
Example:
12345
Register 10: 0 (msw)
Register 11: 12345 (lsw)
12345 = (0 * 65536) + 12345
12: Software Revision Sent as ASCII value, read only.
Example:
A
Register 12: 0 (msb), 65 (lsb)