Universal Serial Interface (Uss) - Siemens MICROMASTER 440 Operating Instructions Manual

3 Functions
NOTE
A communications (CB) module as well as a programming / operator unit can
be simultaneously connected to the COM link interface via terminals 29/30
(USS). This is the reason that the communications module has priority over
USS. In this case, the USS node (USS station) via the COM link is de-activated.
Contrary to PROFIBUS, the RS485 port (terminals 29/30) is not optically isolated
(not floating). When installing the system, it must be ensured that EMC faults do
not result in communication failures or damage to the RS485 drivers.
3.7.1

Universal serial interface (USS)

Parameter range:
Alarms:
Faults:
Function chart number: FP2500, FP2510, FP2600, FP2610
Features:
− electrical features:
− cycle time (MM440): 8 ms
146
P2009 – r2037
Significance
USS basic setting
USS baud rate
USS address
USS-PZD length
USS-PKW length
PZD data
Received data
Received control word 1
Received control word 2
Sent data
Sent status word 1
Sent status word 2
---
F0071, F0072
Not electrically isolated
Not electrically isolated
(process data PZD)
Background (parameter ID value PKW)
MICROMASTER 440
Issue 10/06
COM link BOP link
P2010[0] P2010[1]
P2011[0] P2011[1]
P2012[0] P2012[1]
P2013[0] P2013[1]
r2018[8] r2015[8]
r2036 r2032
r2037 r2033
P2019[8] P2016[8]
r0052 r0052
r0053 r0053
USS at the BOP link with PC-
converter connecting set
USS at COM link
(terminals 29 /30)
Operating Instructions
6SE6400-5AW00-0BP0