Siemens S7-1200 relay problem
Siemens S7-1200 relay problem
(OP)
I have problem with hanging relays in S7-1200 main CPU unit.
After a couple of weeks on and off (30sec)with a small load my outputs starts to hang.
I have seen this on my two instalation and it looks like bad quality on the used relays in the CPU.
My load is a EXx saftey barriar 9176 fron Stahl, data sheet added to the thred.
Cant see any reason for this problem, please help?
After a couple of weeks on and off (30sec)with a small load my outputs starts to hang.
I have seen this on my two instalation and it looks like bad quality on the used relays in the CPU.
My load is a EXx saftey barriar 9176 fron Stahl, data sheet added to the thred.
Cant see any reason for this problem, please help?





RE: Siemens S7-1200 relay problem
RE: Siemens S7-1200 relay problem
Are you turning on/off the relays using any counters? If so, then check if the counters are reaching their maximum values.
RE: Siemens S7-1200 relay problem
My load is non inductive and only 60mA
On and off 30s,
starts to get problem after a couple of week usage
RE: Siemens S7-1200 relay problem
BTW: Is it Johan?
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: Siemens S7-1200 relay problem
Im using a safty barrier directly connected to the PLC.
EXx ia
RE: Siemens S7-1200 relay problem
RE: Siemens S7-1200 relay problem
Where are your systems? Anywhere near me?
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: Siemens S7-1200 relay problem
Do you still have skype
RE: Siemens S7-1200 relay problem
I will visit Braviken soon. Is that where your system is? I have just bought a fast contactless current probe (5 MHz 10 mA-20 A) that may come in handy.
I can pop in and have a look when I go there. Won't cost you a dime - but you'll have to buy me lunch or dinner.
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: Siemens S7-1200 relay problem
Give you a call tomorrow
/Johan
RE: Siemens S7-1200 relay problem
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.