Modbus Communication - Mitsubishi Electric FX3U-232-BD User Manual

FX Series PLC User's Manual - Data Communication Edition
Common Items
1.2.8

MODBUS Communication

1. Outline
1) In the case of the RS-485
Terminal
resistor
2) In the case of the RS-232C
FXCPU
master
• Number of connectable units: Master 1
• Total extension distance
2. Applicable PLCs
PLC
Communication
applicability
3. Communication targets
MODBUS-compatible equipment
4. Function
This function enables MODBUS communication with MODBUS-compatible equipment in accordance with
RS-232C or RS-485.
5. Applications
Line control in the decentralized or centralized method.
A-12
For details, refer to FX
FXCPU
master
• Number of connectable units: Master 1
• Total extension distance
FXCPU
slave
: Slave 1
: 15 m (49'2") maximum
:Applicable (If applicable versions of main units are limited, they are described inside ( ).)
—:Not applicable
FX (FX),FX FX FX
2 2C 0N
— —
/FX
3S
- MODBUS Serial Communication Edition.
FXCPU
slave
• • • • • • • • • • • • • • •
No.1
: Slave 32 maximum
: 500 m (1640'5") maximum
,FX ,FX FX ,FX
1S 1N 1NC 2N 2NC
— —
1.2 Outline and Features of Communication Types
/FX /FX /FX User's Manual
3G 3GC 3U 3UC
FXCPU
slave
No.32
Terminal resistor
FX FX FX
3S 3G 3GC

(Ver. 1.30
 
or later)
1 Introduction
FX ,
3U
FX
3UC

(Ver. 2.40
or later)