Epson/Seiko SRC-320 ABS, Manual

Page: 154 / 176

Maintenance 15. Trouble Shooting
140
Code Meaning Remedy
159 Reading error of encoder revolution data.
1) External noise exists.
2) Disconnection of encoder signal line.
3) Voltage of encoder power source is abnormal.
4) Other than the above.
1) Eliminate external noise source. (Refer to
the section 2.6 in the functions volume.)
2) Check disconnection or miscontact of the
signal line between the controller’s rear
panel and mother board, and AC servo
driver. (Refer to “2.3 Diagram of cable
connection” in the maintenance volume.)
If the red ALARM LED on AC servo driver
is lit, check signal line shown below also.
•
in manipulator.
•
signal cable.
3) Check the ENC+5V voltage at signal con-
nector of motor. If voltage is not proper,
inspect PSU board and wiring. (Refer to
the section 4.4 of the maintenance volume.)
If the green POWER LED on AC servo
driver is off, check the connection of signal
connector of the servo driver. (Refer to
the section 6.2 of the maintenance volume.)
4) Consider the following.
•
Connection of the MPU board.
•
Replace U15 and U16 (SCC) on the MPU
board.
•
Replace the MPU board.
•
Replace the AC servo driver.
•
Replace the motor.
160
Encoder signal disconnection of A phase. Same as error 159.
161
Encoder signal disconnection of B phase. Same as error 159.
162
Encoder signal disconnection of Z phase. Same as error 159.
163
Encoder signal disconnection of S phase. Same as error 159.
164
Character error of absolute encoder.
165
< NOTICE > Encoder is initialized. 1) This error is displayed when encoder is ini-
tialized and controller power is switched on.
Repeat turning the power off and on twice.
2) In other case than the above, check whether
RES wire of encoder shorted with other line
or not.
166
Servo calculation overflow.
167 Malfunction of Servo CPU hardware. Replace or repair the MPU board. (Refer to
the section 7.3 in the maintenance volume.)
168 Servo CPU’s communication error with Sub CPU.