FEC AFC1200 - Manual (Page 15)

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9.4 AXIS UNIT ABNORMAL
ZERO CHECK ABNORMAL CAL CHECK ABNORMAL
OFFSET CHECK ABNORMAL PRESET DATA ABNORMAL
ENCODER ANGLE PULSE ABNORMAL
MOTOR Over TEMPERATURE
ABNORMAL
TOOL Is NOT CONNECTED
SERVO ALARM
FULL SCALE TORQUE OVER ABNORMAL PREAMP EEPROM READ ABNORMAL
TOOL TYPE MISMATCH ABNORMAL
DUAL PORT RAM ABNORMAL
Input Power Over Abnormal Servo I/F Power Supply Abnormal
Servo Type Abnormal * Axis Unit Lockout (No Display)
NOTE: Whenever an Abnormal condition occurs related to the Axis Unit, the Axis Unit
Abnormal displays must be checked for any related Axis Unit display codes. Refer to
Section 9.6.1 prior to performing any corrective maintenance.
9.4.1 ZERO CHECK ABNORMAL ( axis Unit display code "a1" )
<ERROR DESCRIPTION>
the Zero level of the tool transducer is outside the acceptable limits. The following table
details the limits of the check for various equipment conditions.
If the Zero level check is not sequence-initiated, the
System will still perform a Zero level self-check at the
beginning of each fastening cycle. In this case the
Zero level must be within ± 0.250 VDC of the value
detected during power on of the equipment. Zero level check while the Zero Check
function is not enabled via the sequence
program. Performed at the beginning
of each fastening cycle.
The Zero level during a sequence-initiated Zero check
must be within ± 0.125 VDC of the value detected
during power on of the equipment. Zero level check while the Zero Check
function is enabled via the sequence
program. Performed at the beginning of
each fastening cycle.
The Zero level during a PLC-initiated self-check must
be within ± 0.125 VDC of the value detected during
power on of the equipment. Zero level check while the PLC Self-
Check input is enabled, or the Main Unit
Manual RESET is activated.
Zero level must be between -2 VDC and +2 VDC.
The detected value is loaded into memory for
comparison during other Zero level checks. Zero level check at power on.
<CHECK ITEMS>
1. Verify that the tool is properly secured to the mounting plate, and that there is no sign of
stress or misalignment. Ensure that there is no tool movement while the self-check is
being performed.
2. Verify that the homerun (sensor) cable is in good condition and is properly connected to
the Axis Unit and the tool (preamp).
3. ensure that the ISA Main and Axis Units are not located near any strong electrical or
magnetic fields.
4. Verify correct Axis Unit input power (200~230 VAC +/- 10%, 50/60 Hz, 3-phase) and
ensure that the power cable is in good condition and is properly connected.
5. If the problem still exists, replace the tool (homerun) cables with a set that is known to be
good. A spare cable set is normally provided with each System. (Refer to Section 8.3.5)
6. If the problem still exists, replace the affected tool. (Refer to Section 8.3.4)
7. If the problem persists, replace the affected AXIS UNit. (Refer to Section 8.3.3)
Chapter 9: Troubleshooting
Page 9-15