Muhammad Daniyal

Dear all, We have a redundecy system on SLC5/5 using BSN modules both CPU's connected to ethernet switch, how ethernet switch will identify which CPU currently is primary or secondry on ethernet. Kindly explain and how it will work.

Ok bob, i'll provide u all documentaion regarding this issue, the working scenerio is quit diffrent from the available artical on this site. we have made our AT command sets for Micrologix 1200, this will also i qout those commands. and configuration of PLC channels along with cables used in this communications.

Dear All, i have a project about to communicate the PLC (Micrologix 1200) to PC (which is installed with RSView 32) via modem. i have an external modem 3COM US ROBOTICS connected with Micrologix 1200 while the remote side is a pc which is installed SCADA RSView 32 and also installed with PCI modem. this toplogy would be modem to modem communication. kindly help for it that how can we initialize the modem with PLC. while the remote pc dial the number of the modem on other side connected with plc. i have made null modem cable plc to modem. so help for these issuse. waiting for your prompt reply

Thanks every one for coordinate with this issue, i have meture that communication, every thing is working fine and in order. once again thanks.

here is one more point which i ask abt it, can we use the office internal extensiones instead off dail-up lines for both sides?

Please Find the attched images for channel configuration in RS logix. and Driver Configuration in SCADA PC. (if those settings are wrong then send me the actual settings for Micrologix 1200 C series) i have download the program in to PLC, after that i unplug the serial cable from the PC and connect with modem's serial cable, which is 25-pin connected with modem and 9-pin connect with PLC cable. (8-pin MINI DIN pluged in PLC and other side D-Sub 9-pin connect with modem cable, this is null modem cable PLC to modem) after that on other PC installed with RSView 32 and having a internal modem i configure the driver in RS Linx with RS-232 DF1 Devices and configure the driver parameters along with modem configurations. when all of those have to be done, and PC modem dail the number of PLC modem, and goes to connect. but in RS Linx we unable to monitor the connected PLC, now tell me where is the actually problem creates, whether are we using wrong cable for PLC to modem, if yes then, how can we make our modem cable that we could successfully connected with modem and use the PLC in scada software. further information will be provided on request waiting for your reply.

Thanx for your cooporation but i have all it done that u discribe above but fial to communication. will you please tell the any point that may be i bypass of that. and one more think that u explain me that are we need to make a program in plc to communicate with modem. is it necessory or void it. let me please explain this thing or any point that u think, could be skip by me let me also explain of that. thanx for your coordination waiting for your reply

Thanks Dear, i have understand all of the theorogram of Vector control VFD's. once again thanks so much. i hope u will cooporate in future

Dear All, Hows going, i am here to ask something about the VFD's. i already have work on vfd's but the technology never stops. i want to know abt the diffrence between the Vector control Drives and general Drives. and the appliction of vector drives where it can be used. waiting for prompt reply.

Thanx Crossbow, i follow the advice u have quoted. again thanx best regards

Dear All, My siemens plc s7-200 has been hanged, it is in stop position if we switch to the run mode then it does nt change thier stat and still stop mode. pls find some better solution for me, however we could run the system rgds Daniyal