Yaskawa Matrix Converter - Manual (Page 258)

Individual Functions
6-
93
„ Self-Diagnosis
The MxC has a built-in function for analyzing any problems in the serial communications interface circuits.
This function is called the self-diagnosis function. The self-diagnosis function connects the communications
parts of the send and receive terminals, receives the data sent by the MxC, and checks if communications are
being performed normally.
Perform the self-diagnosis function using the following procedure.
1. Turn on the power supply to the MxC, and set 67 (Communications Test Mode) in parameter H1-05
(Multi-Function Digital Input Terminal S7 Function Selection).
2. Turn off the power supply to the MxC.
3. Perform wiring according to the following diagram while the power supply is turned off.
4. Turn on the terminating resistance. (Turn on pin 1 on DIP switch 1.)
5. Turn on the power supply to the MxC again.
Fig 6.60 Details of Communications Terminals
“Pass” will be displayed if self-diagnosis is completed without an error occurring.
If an error occurs, a CE (MEMOBUS communications error) alarm will be displayed on the digital operator,
the error contact output will be turned on, and the MxC operation ready signal will be turned off.
‹ Using the Timer Function
Multi-function digital input terminals S3 to S12 can be designated as timer function input terminals, and
multi-function output terminals M1-M2, P1-PC, and P2-PC can be designated as timer function output termi-
nals. By setting the delay time, chattering from the sensors and switches can be erased.
• Set one of the parameters H1-01 to H1-10 (Terminal S3 to S12 Function Selection) to 18 (timer function
input).
• Set H2-01 to H2-03 (Terminals M1-M2, P1-PC, P2-PC, P3-C3, and P4-C4 Function Selection) to 12
(timer function output).
„ Related Parameters
Parameter
Number
Name
Description
Setting
Range
Default
Change
during
Run
Control Methods
Display V/f
Open
Loop
Vector
Flux
Vector
b4-01
Timer Function
ON-Delay Time Sets the timer function output on-delay time
(dead band) for the timer function input, in 1-
second units.
Enabled when a timer function is set in H1-
†† or H2-††.
0.0 to
300.0
0.0 s No A A A
Delay-ON Timer
b4-02
Timer Function
OFF-Delay Time Sets the timer function output off-delay time
(dead band) for the timer function input, in 1-
second units.
Enabled when a timer function is set in H1-
†† or H2-††.
0.0 to
300.0
0.0 s No A A A
Delay-OFF Timer
5
5%
5 5 5 5 5 5 4
4㧙 5
5㧙