Lenze SCF Series Drives Modbus Communications - Manual (Page 10)

RG-SFMOD 6
Drive Setup & Operation
4 SCF Drive Setup & Operation
4.1 Serial Address
All AC Tech drives have a Serial Address Parameter that must be programmed prior to attempting to
operate the serial interface (Programming Parameter #43 / AC Tech Register #93).
4.2 Serial Communications Parameter
All AC Tech drives have a Serial Communications Parameter that governs the operation of the Serial Link.
On SCF drives this is #15 SERIAL LINK (register #65). Table 4 lists the selections for SC Parameter 15,
SERIAL LINK.
Table 4: SCF Parameter 15 Selections
Setting Description Watchdog Timeout Period
1 DISABLE
2 9600,N,2 WITH TIMER 10 sec
3 9600,N,2 WITHOUT TIMER
4 9600,E,1 WITH TIMER 10 sec
5 9600,E,1 WITHOUT TIMER
6 9600,O,1 WITH TIMER 10 sec
7 9600,O,1 WITHOUT TIMER
Explanation of Terms:
• DISABLED serial link not operational
• WITH TIMER serial link allows reading & writing of both control & programming parameters.
Watchdog timer is enabled (refer to section 4.6,
Watchdog Timer ).
• WITHOUT TIMER serial link allows reading & writing of both control & programming parameters.
Watchdog timer is disabled (refer to section 4.6, Watchdog Timer ).
The Serial Communications Parameter must be appropriately programmed prior to attempting to
communicate with the drive.
4.3 Control Parameter
Programming parameter #14 (control) must be programmed to 01 (terminal strip only). Serial operation will
not work correctly if 02 (remote keypad only) or 03 (terminal strip or remote keypad) are selected.