2. SPECIFICATIONS
IIMS01J02-E2
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