Operation
17300758785_001_C1 - 06/2019 - © Leybold
4.2.2 X104 Serial RS-485 Interface
Alternatively, the X104 RS 485 interface can be used to operate the pump,
giving access to additional operational parameters for the frequency convert-
er.
The operating parameters can be accessed via MODBUS protocol or via the
LEYASSIST software (see Section 1.4. Accessories).
The following connection parameters are used for communication:
Protocol Modbus RTU
Baud rate 9600 bps
Data length 8 bit
Parity No parity
Stop bit 1 bit
Address 1
Modbus Register List
Description Read/
Write
Modbus
Register
Settings
Run Command Write 2000H Bit 1~0
01B: Stop
10B: Run
Bit 5~4 Always set to: 01B: FWD
Bit 14~13
Run command source:
00B: No function
01B: Digital keypad
10B: Operated by 00-21 Setting
11B: Change operation source
All other bits set to zero.
Frequency Command (Hz) Read 2102H
Frequency Command (Hz) Write 0400H
Output Frequency (Hz) Read 2103H
Output Current (A) Read 2104H
Output Voltage (V) Read 2106H
DC Bus Voltage (V) Read 2105H
Output Power (kW) Read 210FH
Drive Status Read 2101H Bit 1~0
AC motor status:
00B: Drive stops
01B: Drive decelerating
10B: Drive standby
11B: Drive operating
Source of operation command Write 0015H
1: External terminals
2: RS485 Communication
Error code Read 2100H Error codes listed in section „Troubleshooting“
Reset Write 2002H Set Bit 1 to 1 for Reset
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