ModWeigh MW93A - Comms Port 2 - RS485; Comms Port 3 - RS485 MR1; Interface Registers

EMC INDUSTRIAL GROUP LTD Communications & Display
MW93A_IM_ALL_SV6.09f_en 43/59
Q2512 COM1&2 modbus address [1 to 30] 8592, g12 1
modbus address.
Q2513 COM1 stop bits 18052, g12 0
stop bits description
0 automatic (1 stop on receive, 2 bits for send)
1 1 stop bit
2 2 stop bits
Q2514 COM1 mode 18060, g12 0
COM1 mode description
0 auto : use extended modbus
1 modbus : use standard modbus
Setting to modbus may speed up the select key in some situations where strict modbus protocols are
required. For example Modbus gateways and convertors.
Q2515 COM1 handshake enable [0=disable, 1=enable] 8584, g12 0
When set to 1, hardware handshaking is enabled. Set to 0 to disable hardware handshaking.
Q2510 COM1 error count 8810, g12
Comms port 2 - RS485
Q2521 COM2 baud rate (8 data, no parity, 2 stop) 8590, g12 230400
Sets the communications speed.
Q2522 COM1&2 modbus address [1 to 30] 8592, g12 1
modbus address.
Q2523 COM2 stop bits 18054, g12 0
Q2524 COM2 mode 8838, g12 0
COM2 mode description
0 auto : use mwbus – automatic fall back to modbus slave
1 modbus : use standard modbus
If this port is connected to an external modbus master, then this should be set to modbus.
Q2520 COM2 error count 8812, g12 Hz
Shows the operating mode (MWBUS or MODBUS). The ‘cycle time’ is the MR1 update rate. A list of
device addresses on the bus is shown.
Communications error counts are shown, which should usually
read 0.
Comms port 3 - RS485 MR1
Q2531 COM3 baud rate (8 data, no parity, 2 stop) 8588, g12 115200
Sets the communications speed.
Q2533 COM3 stop bits 18056, g12 0
Interface registers
These registers are the recommended registers to use for extracting the basic signals from the trans-
mitter via Modbus. The advantage of using these registers is that multi-register Modbus commands can
be used to make the interface more efficient.
A control or status register contains 32 bits of on or off information. When one of these registers is
displayed, a bit is selected by using the left and right arrow keys.
Registers 1
Q25411 gross weight 8000, g12
Q25412 no function 8002, g12
Q25413 speed demand 8004, g12
Q25414 current setpoint 8006, g12
Q25415 total weight 8008, g12
Q25416 flowrate 8010, g12
Q25417 control1 & control2 8012, g12
Q25418 control3 & status1 8014, g12
Q25419 status2 & status3 8016, g12
Q25410 IOx & faults 8018, g12