Mitsubishi Electric 800 Series Instruction Manual page 312

• Setting "100" to Pr.291 enables out of the pulse train input as it is to the pulse train output (terminal FM). Connecting in a
daisy chain enables speed synchronized operation of multiple inverters.
• Set Pr.384 to "125" for inverters that receive pulse train since the maximum pulse train output is 50k pulses/s.
• The maximum number of input pulses should be 50k pulses/s.
• When performing synchronized operation, wire according to the following procedure. (This is to prevent contact input of 24
V from being applied to the terminal FM.)
1) Set pulse train output (setting other than "0, 1") to Pr.291 on the master side inverter.
2) Turn the inverter power supply OFF.
3) Wire the slave side terminal JOG-SD to the master side terminal FM-SD.
4) Turn the inverter power supply ON.
NOTE
• After changing the Pr.291 setting, connect the JOG terminal to the terminal FM-SD. When FM output (voltage output) is taken
as the pulse train, take caution to prevent voltage from being applied to the terminal FM.
• Use the sink logic (factory setting) for the slave side inverter. The inverter does not operate properly with source logic.
Speed synchronized operation specification
Item
Pulse width fixed (10 s)
Output pulse format
Pulse rate 0 to 50k pulses/s
1 to 2 s/1 unit
Pulse propagation delay
 A pulse transmission delay of about 1 to 2 s in the slave occurs and further increases when the wiring length is long.
Parameters referred to ???????
Pr.291 Pulse train I/O selection
Pr.419 Position command source selection
Specification

page 357
page 225
(D) Operation command and frequency command
311
PARAMETERS
5
GROUP
D