Siemens MICROMASTER 420 - Manual (Page 53)

Issue 07/04 3 Functions
MICROMASTER 420 Operating Instructions
6SE6400-5AA00-0BP0 53
3.2.2 Description of the AOP (Advanced Operator Panel)
An AOP (this is available as option) has the following additional functions with
respect to a BOP:
Multi-language and multi-line plain text display
Units are additionally displayed, such as [Nm], [°C], etc.
Active parameters, fault messages, etc. are explained
Diagnostics menu to support troubleshooting
The main menu is directly called by simultaneously pressing keys Fn and P
Timer with 3 switching operations per entry
Up to 10 parameter sets can be downloaded / saved
Communications between an AOP and MICROMASTER are realized using the
USS protocol. An AOP can be connected to the BOP link (RS 232) as well as to
the COM link interface (RS 485) of the drive inverter.
Multi-point capable coupling to control (open-loop) and visualize up to 31
MICROMASTER drive inverters. The USS bus must, in this case, be configured
and parameterized via the drive inverter terminals of the COM link interface.
Please refer to Sections 3.2.3, 3.2.4 and the AOP Manual for additional details.
NOTE
Contrary to the BOP, for the AOP, the communications parameters of the
particular interface must be taken into account.
When inserting / connecting to the drive inverter, the AOP automatically
changes the parameter P2012 (USS-PZD length) to 4 corresponding to the
interface.
COM link: P2012[0]
BOP link: P2012[1]
For DriveMonitor, the default value for the USS-PZD length is set to 2. This
results in a conflict if the AOP and the DriveMonitor are operated, alternating, at
the same interface.
Remedy:
Increase the USS-PZD length to 4.