Ramsey
Guest
R
Does any one connected to Prosoft Modbus card via modem.
I am having hard time communicating via modem.
I can directly connect to 3150-MCM modbus card via Wintech Modscan32 via serial cable without any problem.
but if i connect via modem i immediatley get "modbus message time out" in my wintech software after both modem establish communicaiton.
My 3150-MCM port 1 is configured as Modbus Slave. Address 1, Baud rate 9600, non parity, 1 stop bits. RS232 , Modbus RTU protocol
I am able to read Input status 1xxxx and Holding register 3xxxx serially via my com port 1 using Wintech Modscan32
But when i dial via modem to port1. both modem gets connected but no RX, TX going on or no data.
I used AB/Zycom Remote access modem kit (9300-RADKIT). I also tried Motorollo 3460 Fast modem same result.
the pin configuration that i used are as below.
3150-MCM Modem
RX (2) ------- TX(3)
TX (3) ------- RX(2)
DTR(4) ------- DSR(6)
GND(5) ------- GND(5)
DSR(6) ------- DTR(4)
RTS(7) ------- CTS(8)
CTS(8) ------- RTS(7)
My PC side i used null modem cable to connect my PC to Modem.
I read 3150 User manual several times and also did connection as per manual page no.50 which is opposite to the above wiring. but same result.
where am i making mistake.
I am having tough time with this MCM card as well as my customer as i am unable to read via modem.
Any help / wiring diagram or conection diagram please.
If required i will even post my ladder logic. but donot know how to attach files here.
many thanks. I hope some one will help. thanks.
I am having hard time communicating via modem.
I can directly connect to 3150-MCM modbus card via Wintech Modscan32 via serial cable without any problem.
but if i connect via modem i immediatley get "modbus message time out" in my wintech software after both modem establish communicaiton.
My 3150-MCM port 1 is configured as Modbus Slave. Address 1, Baud rate 9600, non parity, 1 stop bits. RS232 , Modbus RTU protocol
I am able to read Input status 1xxxx and Holding register 3xxxx serially via my com port 1 using Wintech Modscan32
But when i dial via modem to port1. both modem gets connected but no RX, TX going on or no data.
I used AB/Zycom Remote access modem kit (9300-RADKIT). I also tried Motorollo 3460 Fast modem same result.
the pin configuration that i used are as below.
3150-MCM Modem
RX (2) ------- TX(3)
TX (3) ------- RX(2)
DTR(4) ------- DSR(6)
GND(5) ------- GND(5)
DSR(6) ------- DTR(4)
RTS(7) ------- CTS(8)
CTS(8) ------- RTS(7)
My PC side i used null modem cable to connect my PC to Modem.
I read 3150 User manual several times and also did connection as per manual page no.50 which is opposite to the above wiring. but same result.
where am i making mistake.
I am having tough time with this MCM card as well as my customer as i am unable to read via modem.
Any help / wiring diagram or conection diagram please.
If required i will even post my ladder logic. but donot know how to attach files here.
many thanks. I hope some one will help. thanks.