
B–62075E/04
1. OPERATION OF MDI PANEL
24
#7
ALDF3025
#6 #5 #4
EXPC
#3 #2 #1 #0
Cause of the alarm
7 bit
ALDF
4 bit
EXPC
Motor overheated 1 0
Amplifier overheated 0 0
Disconnected built–in pulse coder (hard) 1 0
Disconnected separate pulse coder (hard) 1 1
Disconnected pulse coder (soft) 0 0
When a disconnection alarm (SV 015) is issued for axis 1, assume that the
diagnostic data of Nos. 3014 and 3015 is as follows:
No. 3014: 00000010
No. 3015: 10110100
FBAL (bit 1) of diagnostic data No. 3014 is set to 1.
Both ALDF (bit 7) and EXPC (bit 4) of diagnostic data No. 3015 are set
to 1. The diagnostic data indicates that the cause of the alarm is a
disconnected separate pulse coder (hard).
Details of digital servo alarms
#7
OVL3024
#6
LVAL
#5
OVC
#4
HCAL
#3
HVAL
#2
DCAL
#1
FBAL
#0
OFAL
Symbol Description
OFAL LSI OVERFLOW
An overflow alarm occurred in the digital servo.
FBAL PULCO DISCONNECTION
A disconnected pulse coder alarm occurred.
DCAL EXCESS I FROM MOTOR
A regenerative discharge circuit alarm occurred in the servo am-
plifier.
(LED DC on the servo amplifier is on.)
HVAL EXCESS V TO MOTOR
An overvoltage alarm occurred in the servo amplifier.
(LED HV on the servo amplifier is on.)
HCAL ABNORMAL CURRENT IN SERVO
An abnormal current alarm occurred in the servo amplifier.
(LED HC on the servo amplifier is on.)
OVC EXCESS CURRENT IN SERVO
An overcurrent (overload) alarm occurred in the servo amplifier.
LVAL POWER V TOO LOW
An insufficient voltage alarm occurred in the servo amplifier.
(LED LV on the servo amplifier is on.)
OVL SV OVERLOAD
An overload alarm occurred in the servo motor or amplifier.
When this alarm occurs in the servo amplifier, the servo amplifi-
er, separate discharge unit, or power transformer is overheated.
(LED OH on the servo amplifier is on.)
Example