Instruction manual

2. SPECIFICATIONS
IIMS01J02-E1
16
 Communication functions
 COM.PORT1/COM.PORT2
Interface: Based on RS-422A, EIA standard
Based on RS-485, EIA standard
Specify when ordering
Connection method: RS-422A: 4-wire system, multi-drop connection
RS-485: 2-wire system, multi-drop connection
Protocol: • Based on ANSI X3.28 subcategory 2.5 B1 (RKC communication)
Error control: Vertical parity (when parity bit is selected)
Horizontal parity
Data types: ASCII 7-bit code
• Modbus protocol
Signal transmission mode: Remote Terminal Unit (RTU) mode
Function codes: 03H Read holding registers
06H Preset single register
08H Diagnostics (loopback test)
10H Preset multiple registers
Error check method: CRC-16
Error codes: 1: Function code error (An unsupported
function code was specified)
2: − When written to read only data
− When any address other than 0000H
to 02EEH is specified (However,
07D0H to 0BB7H are excluded)
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
• MITSUBISHI MELSEC series special protocol
AnA/AnUCPU common command (QW/QR)
• MITSUBISHI MELSEC series special protocol
ACPU common command (WW/WR)
• OMRON SYSMAC series special protocol
• SHARP JW50H/70H/100H and JW30H special protocol
Computer link (command mode)
• LG MASTER-K and GLOFA-GM series special protocol
Protocol can be selected with switch