Lenze MCH Series Drives Siemens P1 - Manual (Page 9)

RG-MHSP1F 6
Drive Setup & Programming
32 HZ MULTIPLIER This parameter must be set for the specific application so that Actual Speed
(Point 5) and Command Speed (Point 10) will function properly. To calculate the
appropriate setting for this parameter, divide the Motor Rated Speed by Drive
Parameter #11 (Maximum Frequency). This parameter’s factory default setting of
30.00 assumes a motor rated speed of 1800 RPM.
57 SERIAL This parameter needs to be set to either WITH TIMER (default) or W/O TIMER for
the drive to communicate with the FLN. Serial communications will not work if this
parameter is set to DISABLED.
58 SERIAL ADDRESS This point contains the address of the FLN device. It is adjustable from 0−99 but
should be set in the range of 1-98 when on the LAN. This parameter’s default
address of 99 is intended for configuration purposes only.
59 SERIAL BAUDRATE This parameter defaults to 4800bps and will, typically, not have to be changed.
In some cases, however, the FLN may be set up to communicate exclusively with
VFDs. In this situation, a baudrate of 9600bps is preferred and this parameter
should be set accordingly.
60 SERIAL TIMEOUT This parameter makes the serial watchdog timeout period selectable. This
parameter has a minimum value of 10 seconds and a maximum value of 255
seconds. The default is 30 seconds. If no action is to be taken when a serial
watchdog timeout occurs, Drive Parameter #57 (Serial) should be set to W/O
TIMER. This will disable the watchdog timer. Otherwise Drive Parameter #57
(Serial) should be set to WITH TIMER.
If the FLN has started the drive or has modified the Speed Source Selection (Point
34), the Keypad Speed Command (Point 36) or the Keypad Setpoint Command
(Point 37) and a serial watchdog timeout occurs, the drive will be taken out of
serial control. If the drive was running when the timeout occurred, the drive will
also stop the motor by tripping into a SERIAL FAULT. A fault reset command, issued
via Clear Present Fault (Point 94), a keypad stop or a terminal stop is required to
clear the fault.
When Drive Parameter #30 (Control) is set to SERIAL SPEED the speed reference
being used MUST be set to the drive keypad (-KEY or -MKB) for the serial watchdog
to be active. When Drive Parameter #30 is set to SERIAL AUTO the serial watchdog
will be active with any speed reference.
When a serial timeout occurs and the drive is taken out of serial control, any
overrides that were in effect prior to the timeout will be maintained. In order for the
drive keypad to take control of the Speed Source Selection, the Keypad Command
Speed or the Keypad Setpoint Command, the drive H/O/A must first be toggled to
HAND or OFF to release the overrides on the corresponding P1 points.