2. SPECIFICATIONS
IMS01J02-E4
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, half-duplex multi-drop connection
RS-485:
2-wire system, half-duplex multi-drop connection
Protocol:
Based on ANSI X3.28-1976 subcategories 2.5 and 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