Mark Buskell
Member
I got the two processors communicating over DH+.
In the PLC5 I have the following rung.
N52:0/0 ........... N50:96/0
---|\|-----------------( ) HandShake to SLC
XIO N52:2/0 OTE N50:96/0
N50:96/0 ........... T4:1, 10 SEC
---|\|-----------------TON Loss of Comm Timer
|
| N50:96/0 ............T4:2, 10 SEC
---| |-----------------TON Loss of Comm Timer
BST XIO N50:96/0 TON T4:1 1.0 10 0 NXB XIC N50:96/0 TON T4:2 1.0 10 0 BND
Either timer done bit sets an alarm.
In the SLC I have:
N52:0/0........... N50:96/0
---| |-----------------( ) HandShake to PLC
I am using message blocks and the heartbeat works great. N50:96/0 toggles on and off like it should. I have noticed that when I unplug the SLC and depending on the scan, N50:96/0 could be either on or off.
If I get comm loss between them, I need an alarm to tell me if the SLC goes down.
The only way I can figure it out so far is with two timers. Is there a simplier way to do this with 1 timer. I am also using RSView 7.0 and have an alarm tag set up to monitor comm loss.
In the PLC5 I have the following rung.
N52:0/0 ........... N50:96/0
---|\|-----------------( ) HandShake to SLC
XIO N52:2/0 OTE N50:96/0
N50:96/0 ........... T4:1, 10 SEC
---|\|-----------------TON Loss of Comm Timer
|
| N50:96/0 ............T4:2, 10 SEC
---| |-----------------TON Loss of Comm Timer
BST XIO N50:96/0 TON T4:1 1.0 10 0 NXB XIC N50:96/0 TON T4:2 1.0 10 0 BND
Either timer done bit sets an alarm.
In the SLC I have:
N52:0/0........... N50:96/0
---| |-----------------( ) HandShake to PLC
I am using message blocks and the heartbeat works great. N50:96/0 toggles on and off like it should. I have noticed that when I unplug the SLC and depending on the scan, N50:96/0 could be either on or off.
If I get comm loss between them, I need an alarm to tell me if the SLC goes down.
The only way I can figure it out so far is with two timers. Is there a simplier way to do this with 1 timer. I am also using RSView 7.0 and have an alarm tag set up to monitor comm loss.