Yaskawa VS-616G5 InterBus-S Control Card SI-R - Manual (Page 12)

Page 12 VS-616G5 Option Instruction Manual: InterBus-S Control Card SI-R
Object 6802 (MODBUS Commands)
Using this parameter the IBS master can access the inverter parameters by send-
ing MODBUS commands. A MODBUS command is sent to the G5 option card
with PCP service write parameter and the result is accessed with PCP service
read parameter.
The MODBUS command is entered in an array of integers. The command has
the following structure:
The MODBUS response has the following structure:
If a fault occurs, the option card indicates an ERROR response by setting the
MSB bit in the MODBUS Response code to one (1). The data word then contains
the ERROR code.
Word Name Description
1
MODBUS command
Word1 = 0003 (HEX) = Read command
0010 (HEX) = Write command
Other commands will result in an error response.
2 Address Word2 = Inverter internal address (HEX)
3 Data Word3 = Command data
Word Name Description
1
MODBUS response
Word1 = 0000 (HEX) = Waiting for response from inverter
0003 (HEX) = Data contains read response
0010 (HEX) = Write complete
0083 (HEX) = Read command error
0090 (HEX) = Write command error
2 Address Word2 = Inverter address
3 Data Word3 = Response data or ERROR code
Error Error Code Description
Function error 01H Unregistered MODBUS function code.
Address fault 02H Parameter address (Starting address) is greater than 600H.
Designate unused parameter address.
No. of data faults 03H Read more than 4 words.
Write more than 4 words.
Data content fault 21H Parameter contents exceed the upper or lower limit.