KNIGHT D-SERIES SERVO HOIST OPERATION MANUAL
SECTION 5
SOFTWARE
46
D. Loading New Hardware with Existing Software
Yaskawa PLCs, Drives, Motors, and VIPA I/O can be replaced in the field and the process for each will be
explained in this section.
If the need to replace the Yaskawa PLC should arise, a new PLC will need to be purchased from Knight
directly. This PLC will be shipped as a preassembled unit and will need to be preloaded with the appropriate
software at Knight. Any update Archives will be specific to an individual PLC and are tracked based upon
the hoist that it was originally shipped with.
WARNING
Installing an incorrect Archive will cause a Hardware Mismatch and cause
the hoist to cease normal operation.
Step 1. Lower the hoist’s support fixture and part so that no load is suspended from the hoist.
WARNING
There can be NO load suspended from the hoist prior to replacing a
hardware component.
Step 2. Press the Run-Stop button.
Step 3. Remove the input power from the system.
Step 4. If possible, it is recommended to bring the hoist to ground level to replace the components listed
in this section. All components listed will need to be replaced with an exact match to ensure
functional requirements in order to run correctly.
Motors can be replaced per Knight procedures: This will cause a loss of position and can be
corrected by following the ‘Reset Absolute Encoder’ procedure (see 5.E Step 42).
Drives can be replaced per Knight procedures: This will cause a loss of position and can be
corrected by restoring the Drive Parameters stored in the PLC via the web browser. Once
drive parameters have been restored, the ‘Reset Absolute Encoder’ procedure will be
required as well to re-establish the appropriate drive motor relationship.
VIPA I/O will require the correct Node address to be programmed if the Mechatrolink adapter
portion is replaced.
Related cabling of the Motor, Mechatrolink, Ethernet, etc.… should not require any direct
programming procedures unless they caused a corruption of data in another device.