Manufacturer : Mitsubishi Electric
Product No. : QJ71MB91
Product Type : MODBUS Interface Module
MODBUS ® Interface Unit
Transmission specification interface : RS-232 × 1 channel RS-422/485 × 1 channel
Transmission specification Transmission speed : 300 , 600 , 1200 , 2400 , 4800 , 9600 , 14400 , 19200 , 28800 , 38400 , 57600 , 115200 bps · The total transmission speed of the two interfaces can be used within 115,200 bps
Transmission specification Transmission distance RS-232 : Maximum 15 m
Transmission specification Transmission distance RS-422/485 : Maximum 1200 m (total extension distance)
Master function Automatic communication function Number of communicable slaves : 32 units per channel
Master function Automatic communication function Function (for transmission) : 7 Function
Master function Automatic communication function Area size for input : 4K words
Master function Automatic communication function Output area size : 4K words
Master function Communication by dedicated command Number of concurrently executable instructions : One instruction per channel
Master function Communication by dedicated command Function (for transmission) : MBRW instruction: 9 function MBREQ instruction: 19 function
Master function Communication by dedicated command Area size for input : Up to 253 bytes per instruction
Master function Communication by dedicated command Output area size : Up to 253 bytes per instruction
Slave function Automatic response function Function (for reception) : 17 Function
Slave function MODBUS ® device size coil : 64K point
Slave function MODBUS ® device size input : 64K point
Slave function MODBUS ® device size Input register : 64K point
Slave function MODBUS ® device size Hold register : 64K point
Slave function MODBUS ® device size Extended file register : Up to 4086 K points
Slave function Number of simultaneous acceptable request messages : One request per channel
Slave function Station number : 1 to 247
