Haresh Mali

thanks Steve and other friends for your support. my all problem get solved after changing the 10-slot base plate. now i can communicate through power module and CMM 311 module. but still confusion, why PLC not showing the hardware fault. it shows all H/w OK. bye the way again thanks a lot to Steve and other friends.

yes have expansion I/O rack system and checked the power module (inter change with running system)which found OK. but second module also gives the same problem on fault system. now the condition is like, my system is in READY state (READY LED available on power supply), but i m not able to communicate through 15 pin connector on power supply. so my HMI is not communicating with PLC (HMI connects through power supply port). in my system one CMM311 module is available unused. is it possible to run HMI on CMM311 ? (without changing any program) HMI has 15 pin male connector.

hi steve & tushar, thanks for the feedbeck. at last, i have inter change the CPU with the other running system (done the reprogramming) which is now running well. and the running CPU gives the same problem on the faulty system. now it looks like problem with the base plate, but a bit confused that OK led is glowing. is it possible that hardware fault is present in the system and OK LED available. plz put knowledge light on this matter.

thanks steve, i have check the DC voltage between pin 5 & 7 on the power module 15 pin connector. it shows 4.80 V dc. here is the cable pin config that i m using DB 9 (Female) DB 15 (male) pin 2 (db9) <-------------------------------------------------> pin 12 (db15) pin 3 (db9) <-------------------------------------------------> pin 10(db15) pin 5 (db9) <-------------------------------------------------> pin 7 (db15) sort links pin 7 (db9) <-------------------------------------------------> pin 8 (db9) pin 6 (db15)<-------------------------------------------------> pin 15 (db15) pin 8 (db15)<-------------------------------------------------> pin 14 (db15) any changes in cable required ? plz revert beck me.

hi, i m new to this form, plz help me. i am finding problem in communication with GEFanuc 9030, CPU350. getting the error massage " PLC port can not opended." i m using SNP connector of the power supply PWR331. the connecting cable is USB to serial converter and after DB female to DB 15 male converter cable. i m using the same cable on the other 90-30 system with same cpu and cable works OK. help me on this.