Lenze ESVZAR0 RS-485 - Manual (Page 15)

13 CMVMB401C
Modbus Message
6 Modbus Message Details
These abbreviations will be used throughout this section to illustrate the message structure:
R
Read
W Write
RS Response
SA Slave Address (01 ... F7 hex)
EC Exception Code
RH Register Address (high byte)
RL Register Address (low byte)
DxH Data (high byte)
DxL
Data (low byte)
CRCH Cyclic Redundancy Check (high byte)
CRCL Cyclic Redundancy Check (low byte)
6.1 Register Reading
6.1.1 Message structure for reading one 16-bit register
All registers except #1
R SA 03 RH RL 00 01 CRCH CRCL
RS SA 03 02 DH DL CRCH CRCL
6.1.2 Message structure for reading two 16-bit registers
Registers 32, 60 and 64 only
R SA 03 RH RL 00 02 CRCH CRCL
RS SA 03 04 D1H D1L D2H D2L CRCH CRCL
D1H and D1L are the high and low bytes of the first 16-bit register value (32, 60, 64)
D2H and D2L are the high and low bytes of the second 16-bit register value (33, 61, 65)
Example: Total Run-time Hours = 305419896 (12345678h)
Register #60 (low word of total run-time hours) = 5678h
Register #61 (high word of total run-time hours) = 1234h
R SA 03 00 3C 00 02 CRCH CRCL
RS SA 03 04 56 78 12 34 CRCH CRCL