Preliminary Adjustment Adjustment Section
©Vertical Express 2-12 Printed in USA April 2020
Verify Proper Resistive Loading
(continued)
3. Measure the resistive loading for the Car CAN channel, between CCH and CCL.
a. Measure from CON2 or CON3 on the IOF Card (located in the controller) across
CCH and CCL. The typical measurement is 60 ohms +/-3 ohms.
b. If the resistive loading is incorrect, see CAN Channel Resistive Loading Verification
on page 4-7.
4. Repeat step 3 for each controller.
Remove all power from connected controllers before performing any Group and
Hall CAN channel resistance checks.
5. Perform the following appropriate procedure. If either procedure does not apply to the
job, continue to step 6.
• If the controller is connected to other controllers (grouped):
a. Remove power from all controllers in the group.
b. Measure resistance, as if the systems were in operation, between RCH and RCL
(Group CAN Channel) with all control system CAN communication connections
connected.
c. Check the resistance from any controller in the group, across RCH and RCL from
CON40 of the IOF Card. The typical measurement is 60 ohms +/-3 ohms.
d. If the resistive loading is incorrect, see CAN Channel Resistive Loading Verification
on page 4-7.
• If the Hall CAN channel is used and the controller is not connected to other controllers
(grouped):
a. Remove power from all controllers in the group.
b. Measure the resistance, as if the systems were in operation, between HC1H and
HC1L (Hall CAN Channel) with all control system CAN communication connections
connected.
c. Check the resistance from each connected controller in the group, across HC1H
and HC1L from CON1 of the IOF Card. The typical measurement is 60 ohms +/-3
ohms.
d. If the resistive loading is incorrect, see CAN Channel Resistive Loading Verification
on page 4-7.
6. Restore power, return elevator(s) to service, and verify proper operation.
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