08/2005 Error Codes of Alarm 300500
4-979
© Siemens AG, 2005. All rights reserved
SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
Extension 2 NC drive number
Explanation When the actual current measuring is starting up and during cyclical operation with a
pulse disable, current 0 is expected as the system ensures that no currents can flow.
Deviation from current 0:
The hardware for actual current measurement may be defective.
Module selection does not match the existing hardware:
If a single-axis power section has been addressed as a two-axis power section by the
module selection (software parameterization of power section), this system error is out-
put via actual current measurement because a current > 0 is measured.
Remedy Deviation from current 0:
Replace the control module. Check the cable connections.
Module selection does not match the existing hardware:
− Change software parameterization of power section (two-axis power section -> sin-
gle-axis power section).
− 2. Define axis as inactive or use a two-axis power section.
Error code 0020H
Error text Second axis defined as single-axis module by SERVO.
Extension 1 -
Extension 2 -
Explanation The NC has attempted to activate the second axis on a single-axis module. Possible
communication failures on the drive bus or control module defective.
Remedy Replace the control module. Check cable connections, perform remedial measures
(check shielding or ground connection).
Error code 0021H
Error text Two active axes: At least one is defined as single-axis module by SERVO
Extension 1 -
Extension 2 -
Explanation The NC has attempted to activate the second axis on a single-axis module, possible
communication failures on the drive bus or control module defective.
Remedy Replace the control module. Check cable connections, perform remedial measures
(check shielding or ground connection).
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