Lenze smd Series Drives - Manual (Page 29)

25 RG-SDMOD
Drive Control & Communication
7 Quick Start Instructions
Follow these Quick Start instructions to use Modbus Communications for basic network control of an
smd drive. These instructions are for basic start, stop, direction and speed control of the smd drive. To
download the
smd manual visit the Lenze-AC Tech Technical Library at http://www.lenze-actech.com.
7.1 Initial Settings
These instructions are for basic start, stop direction and speed control of the smd drive using Modbus
communication.
1. Set Drive Parameter C01 to 11.
2. Set Drive Parameter C09 to the desired network address that the Modbus master will poll. Valid Modbus
addresses are 1-247.
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.
3. The Modbus master needs to be set to use 9600 baud. No other baud rates are supported by the SMD
drive.
4. The SMD series drive has the provision for a watchdog timer to monitor network communications to
the drive. The drive’s timeout behavior is set using Parameter n22 and the timeout period is set using
Parameter n23 as shown in Table 19.
Table 19: Watchdog Timer
Code Possible Settings Important
No. Name Lenze Selection
n22 Serial Timeout Action 0 0 Not Active
1 Controller Inhibit
2 Quick Stop
3 Trip Fault "FC3" Selects controller reaction to
serial timeout
n23 Serial Fault Time 50 50 - 65535 ms Sets the serial timeout length
Set n22 and n23 as appropriate for the application:
5. The drive needs to have its network data formatting set the same as the Modbus master.
a. If the Modbus master is set to use 8 data bits, no parity and two stop bits, set c25 to 0.
b. If the Modbus master is set to use 8 data bits, no parity and one stop bit, set c25 to 1.
c. If the Modbus master is set to use 8 data bits, even parity and one stop bit, set c25 to 2.
d. If the Modbus master is set to use 8 data bits, odd parity and one stop bit, set c25 to 3.