Siemens CU240B-2 Original Instructions

Configuring the fieldbus
7.6 Communication via RS485
Inverter with CU230P-2 Control Units
150 Operating Instructions, 11/2013, FW V4.6.6, A5E02430659B AG
Procedure
To change the bus address, proceed as follows:
1. Set the new address:
– using the address switches
– from an operator panel in parameter p2021
– in STARTER using screen form "Control Unit/Communication/Fieldbus", or using the
expert list in parameter p2021
2. Switch on the inverter power supply and, if available, the 24 V power supply for the
Control Unit.
3. Switch on the voltages again after all LEDs at the inverter have gone dark.
You have so changed the bus address.
Additional settings
Parameter
Description
p0015 = 21
Drive device macro
Select the I/O configuration (USS fieldbus)
p0791[0 … 1]
Fieldbus analog outputs
Parameter to interconnect the analog outputs for control via the fieldbus
p2030 = 1 Fieldbus telegram selection
1: USS
p2020
Baud rate
Factory setting: 38400 bit/s
p2022
Fieldbus interface USS PZD number
Sets the number of 16-bit words in the PZD part of the USS telegram
Setting range: 0… 8 (0 … 8 words)
p2023
Fieldbus interface USS PIV number
Sets the number of 16-bit words in the PIV part of the USS telegram
Setting range:
• 0, 3, 4: 0, 3 or 4 words
• 127: variable length
r2029
Fieldbus fault statistics
Displays receive faults on the fieldbus interface
p2040
Fieldbus monitoring time
0 ms … 1999999 ms, factory setting: 100 ms.
The more slaves that are connected in the network, the longer the fieldbus monitoring time must be.
If process data is not transferred within one cycle of the fieldbus monitoring time, then the inverter shuts
down with fault F01910.
p2040 = 0 ⇒ bus monitoring deactivated.

Siemens CU240B-2 Specifications

General

Brand	Siemens
Model	CU240B-2
Category	Inverter
Language	English