Instruction manual

2
IMCB14-E1
2. SPECIFICATIONS
(1) Interface:
Based on RS-485, EIA standard
(2) Connection method:
2-wire system, half-duplex multi-drop connection
(3) Protocol:
Modbus
(4) Signal transmission mode
: Remote Terminal Unit (RTU) mode
(5) Synchronous method:
Start/stop synchronous type
(6) Communication speed:
2400 bps, 4800 bps, 9600 bps, 19200 bps
(Selectable)
(7) Data type:
Data bit: 8 (Byte data corresponding to binary data or
bit)
Parity check : Without, Odd or Even (Selectable)
Stop bit: 1
(8) Function codes:
03H (Read holding registers)
06H (Preset single register)
08H Diagnostics (loopback test)
(9) Error check method:
CRC-16
(10) Error codes:
1: Function code error
(Designation of an unsupported function code)
2: When written to read only data
When any address other than 0000H to 0019H is
specified, etc.
3: When the data written exceeds the setting range
When the specified number of data items in the query
message exceeds the maximum number of data items
available
4: Self-diagnostic error response
(11) Maximum connection:
32 instruments including a master