OP

Open

OP

Command Group: Communication	Access:	Network interfaces:
	W	CANopen
		MODbus
OP - Open device - select the device by address to communicate with		PROFIbus

Synopsis:
	Command	Response
Set	OP	OK (or ERR)

Valid for	Min. value	Max. value
141.181	0	255
141.184	0	255
141.185	0	255
141.186	0	255
142.181	0	255
142.184	0	255
142.185	0	255
142.186	0	255
143.181	0	255
143.184	0	255
143.185	0	255
151.181	0	255
151.184	0	255
151.186	0	255
162.181	0	255
179.181	0	255
64.181	0	255
64.184	0	255
68.181	0	255
68.183	0	255
69.181	0	255
72.181	0	255
72.184	0	255
78.183	0	255
78.184	0	255
88.183	0	63
88.184	0	63
88.185	0	63

OP Open device. When more units are connected in a network only one unit may respond at a time, no matter if the network is a 2-wire or 4-wire communication bus. All units listens to all communication and when an OP command is received all devices closes communication and the one having the given address responds.