Lenze E94P PositionServo Modbus User Manual download pdf (Page 18)

18P94MOD01C

Commissioning

4.3.3 Modbus RTU Slave Node Settings

If using the EIA-485 (RS485) module, open MotionView and click on the [Communication] folder. Then select the

[RS485] folder to set/change the RS485 parameters: Conﬁguration, Baud Rate, Parity, Stop Bits and Address.

Figure 14: RS-485 Folder

Conﬁguration: ‘Modbus slave’ = the modbus slave protocol is enabled on the RS485 port.

UPPP = the RS485 uses UPPP (Point-to-Point Protocol).

Baud Rate: 115200bps, 57600bps, 38400bps, 19200bps, 9600bps

Parity: Even, Odd, None

Stop Bits: 2, 1.5, 1

Address: 1-247

Each slave device in the Modbus network must have its own unique network address. The ‘Addr’ submenu on

the drive display and the front panel buttons can be used to set the Modbus network address.

The RS485 default conﬁguration is: UPPP, 19200bps, No Parity, 2 Stop Bits and Address = 1.

TIP - Avoid using address 1. Most Modbus devices ship with a default address of 1. As duplicate addressing

on a Modbus network is not allowed, this can lead to conﬂicts when replacing and commissioning nodes. To

avoid this it is recommended that you do not set the slave address to 1.

Modbus RTU Folder - Modbus Reply Delay

Modbus Reply Delay is the delay introduced after receiving a Modbus request and before sending a reply. Note

that this delay will always be >= 3.5 characters as required by the Modbus speciﬁcation. Some Modbus master

devices are slower to respond than others and an increase of the ‘Modbus reply delay’ value may be required

to successfully work with these devices.

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Lenze E94P PositionServo Modbus User Manual Page 18