MSC..-1S..E
Supplement: MINI-SCREEN Models with Selectable Trip/Latch Output
P/N 68980
9
Banner Engineering Corp. • Minneapolis, MN U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
Section .1 Addition
.1(s) Troubleshooting Lockout Conditions
An additional error code will indicate if the EDM input requirements have not been satisfied.
See Figure 24(s).
An EDM error will be caused by:
• An open EDM input when the MINI-SCREEN controller tries to close its FSD outputs. The
EDM input must be closed before the system is reset (whether manually or automatically).
• The EDM input being slow to close (i.e., more than 200 ms) once the MINI-SCREEN opens
its FSD outputs and issues a stop command to the machine.
Troubleshooting an EDM Error (Flashing # or “E”)
If monitoring MPCEs with EDM input:
• Flashing # (lockout condition): measure the dc voltage across Mon a and Mon b at TB4
with a voltmeter.
- If the measurement is approximately 32V dc, there is likely an open circuit caused by a
broken wire, a loose connection, or an MPCE that failed in an energized condition (e.g., a
welded relay contact of a forced-guided relay). It should not be possible to reset the MINI-
SCREEN in this condition.
- If the measurement is approximately 0V dc, there is likely a closed circuit. The problem is
likely a slow or sticky MPCE, causing the EDM input to close 200 ms after the FSDs open.
The symptoms may include an intermittent lockout that allows the MINI-SCREEN to be
reset.
- If the measurement is between the two values (0 to 32V dc), a connection or a contact may
have become resistive. Depending on the severity, this may result in intermittent operation.
To troubleshoot further:
1. Remove power from the machine and from the MINI-SCREEN system.
2. Disconnect FSD1, FSD2, and the SSD output.
3. Remove existing wiring from EDM input at Mon a and Mon b, and replace with a jumper.
4. Apply power to the MINI-SCREEN system only.
If the MINI-SCREEN can be reset, the fault is probably in either the external wiring
associated with the N.C. contacts of the MPCEs or in the MPCEs themselves. One or both
of the MPCEs could be at fault; typically both MPCEs should be replaced in this situation.
Possible MPCE failures include slow or sluggish reacting, sticky contacts, contact weld, or
other faults that cause inconsistent or slow response.
If the MINI-SCREEN can not be reset and the “E” error code is still displayed, replace the
controller card or see Section 5.3 of the primary manual.
