Siemens 420 manual BOP link interface BOP on BOP link USS on BOP link

3 Functions Issue 07/04

The BOP, a programming / operator unit (e.g. AOP, PC with DriveMonitor / STARTER) or a programmable control with communications processor can be connected via this BOP link. Data transfer between MICROMASTER and the programming / operator units is realized using the USS protocol via the RS232 interface (point-to-point data coupling). Communications between the BOP and MICROMASTER uses an optimized interface which takes into consideration the somewhat limited resources of the BOP. If the BOP is replaced by an USS unit (PC, AOP), then MICROMASTER automatically identifies the interface of the new unit. This is also true for the inverse replacement sequence. The BOP link interface can be adapted to the particular unit using the following parameters (refer to Table 3-12).

Table 3-12 BOP link

BOP link – interface

BOP on BOP link	USS on BOP link
No parameter	P2009[1]	r2024[1]
	P2010[1]	r2025[1]
	P2011[1]	r2026[1]
	P2012[1]	r2027[1]
	P2013[1]	r2028[1]
	P2014[1]	r2029[1]
	r2015	r2030[1]
	P2016	r2031[1]
		r2032
		r2033

Communication modules (CB) such as PROFIBUS, DeviceNet, CANopen and also programming / operator units (e.g. PCs with the DriveMonitor / STARTER start-up software and AOP) as well as programmable controls with communication processor can be connected to the COM link. The plug connector allows the communication modules to be connected to MICROMASTER. On the other hand, the programming / operator units must be connected to the MICROMASTER through terminals 14/15. As for the BOP link, data is transferred between MICROMASTER and the programming / operator unit using the USS protocol. In so doing, for the COM link, the USS protocol is transferred via the bus-capable RS485 interface. Essentially the same as the BOP link, the COM link also automatically defines if a communications module is replaced with a USS unit (PC, AOP). The COM link can be adapted to the particular unit using the following parameters (refer to Table 3-13).

Table 3-13 COM link

COM link – interface

	CB on COM link		USS on COM link
P2040		r2053	P2009[0]	r2024[0]
P2041		r2054	P2010[0]	r2025[0]
r2050		r2090	P2011[0]	r2026[0]
P2051		r2091	P2012[0]	r2027[0]
			P2013[0]	r2028[0]
			P2014[0]	r2029[0]
			r2018	r2030[0]
			P2019	r2031[0]
				r2036
				r2037

MICROMASTER 420	Operating Instructions
96	6SE6400-5AA00-0BP0