C.13 Self-Diagnostics
The drive has a built-in self-diagnosing function of the serial communication interface circuits. To perform the self-
diagnosis function, use the following procedure.
DANGER! Electrical Shock Hazard. Do not connect or disconnect wiring while the power is on. Failure to comply will result in death or
serious injury. Before servicing, disconnect all power to the equipment. The internal capacitor remains charged even after the power
supply is turned off. The charge indicator LED will extinguish when the DC bus voltage is below 50 Vdc. To prevent electric shock, wait
at least one minute after all indicators are OFF and measure the DC bus voltage level to confirm safe level.
1.
Turn on the power to the drive.
2.
Note the present terminal S5 function selection setting (H1-05) and set it for the communications test mode (H1-05
= 67).
3.
Turn off the power to the drive.
4.
With the power off, wire the drive as shown in the figures below.
5.
Check and note the setting of DIP switch S3. Set it to NPN if it is in the PNP position.
6.
Attach the SI-485/J option to the drive. Wire R+ and S+, R- and S-.
S1 S2 S3 S4 S5 SC A1 +V AC AM AC
MCMBMA
Figure C.9 Terminal Connections for Communication Self-Diagnostics
S– S+ IG R– R+
Figure C.10 Terminal Connections for Communication Self-Diagnostics
7.
Turn on the drive.
8.
During normal operation, the drive will display PASS. This indicates that the communications test mode is
operating normally.
When a fault occurs, the drive will display “CE” on the keypad display.
9.
Turn off the power supply.
10.
Remove the wire jumpers from terminal R+, R-, S+, S- and, S5-SC and set back DIP switch S3 to its original
position. Set terminal S5 to its original function.
11.
Return to normal operation.
C.13 Self-Diagnostics
SIEP C710606 33A OYMC AC Drive – J1000 User Manual
207
C
MEMOBUS/Modbus
Communications
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