Hi,
I'm currently commissioning a production line using controlnet and devicenet. We seem to be experiencing some noticable delays using DN for Robot handshaking and other device triggering.
I've got a total of 11 nodes using a 1756 DNB scanner.
The network baud rate is 250 kbps with a RPI of 20 ms. All nodes are using the polled method with poll rate at every scan. The interscan delay is 10 ms.
Here is a breakdown of the nodes:
4 x PF40 4 IN / 4 OUT
4 X HMS Slave comm DN to serial 32 IN / 8 OUT (Weigh scales)
1 x HMS Comm adapter 14 IN / 14 OUT (Motoman UP20 robot)
1 x Woodhead SST-DN3 8 IN / 8 OUT (ABB IRC5 robot)
I'm thinking of tinkering with the RPI and interscan delay or going from polled to change of state. I'm not sure what the Heartbeat param. is though in COS??
I've only ever config. DN using the Polled method so any help would be great.
Thanks in advance Dave.
I'm currently commissioning a production line using controlnet and devicenet. We seem to be experiencing some noticable delays using DN for Robot handshaking and other device triggering.
I've got a total of 11 nodes using a 1756 DNB scanner.
The network baud rate is 250 kbps with a RPI of 20 ms. All nodes are using the polled method with poll rate at every scan. The interscan delay is 10 ms.
Here is a breakdown of the nodes:
4 x PF40 4 IN / 4 OUT
4 X HMS Slave comm DN to serial 32 IN / 8 OUT (Weigh scales)
1 x HMS Comm adapter 14 IN / 14 OUT (Motoman UP20 robot)
1 x Woodhead SST-DN3 8 IN / 8 OUT (ABB IRC5 robot)
I'm thinking of tinkering with the RPI and interscan delay or going from polled to change of state. I'm not sure what the Heartbeat param. is though in COS??
I've only ever config. DN using the Polled method so any help would be great.
Thanks in advance Dave.