3.23
FUSES E200
The PLC has ve glass fuses in line with it.
Fuse ‘4FU’ is a 2-amp instant blow fuse, which feeds power to the input side of the
PLC
through input terminal ‘L’.
Fuses ‘5FU1’ to ‘5FU4’ are 3 amp time delay fuses which each supply power to a specic bank of output relays through
that bank of relay’s ‘COM’ terminal:
5FU1 is wired to terminal ‘COM 1’ supplying Outputs - Y0, Y1, Y2, Y3
5FU2 to terminal ‘COM 2’ supplying Outputs - Y4, Y5, Y6, Y7
5FU3 to terminal ‘COM 3’ supplying Outputs - Y10, Y11, Y12, Y13
5FU4 to terminal ‘COM 4’ supplying Outputs - Y14, Y15, Y16, Y17
5FU5 to terminal “COM 5” supplying outputs -Y20, Y21, Y22, Y23
PROBLEM # 4
No Display
POSSIBLE CAUSES;
1. No power to the PLC.
2. PLC unit failure.
3. Faulty connection of cable between PLC & Interface
DIAGNOSIS:
1. Check POWER LED (see PLC Inputs and Outputs in this section - Status lights) - to be on when the PLC is
switched on.
• If the light is on, PLC may have failed. Check for proper connection of cable at PLC & at interface. If con-
nection is secure replace. If light is not on - check the (2 amp) PLC fuse.
• If the fuse is OK, check power to it.
PROBLEM # 5
No Blade Speed Display.
POSSIBLE CAUSES:
1. Fault at proximity sensor
• Bad sensor, misadjusted sensor (gap should be approx. 0.015”)
• Contamination on the end of the sensor
2. Fault at the PLC
• Bad connection of sensor wiring
• Faulty PLC input
and HUP L/S deactivates.
7. After the cut is completed HDN input should light, HDN output should go out, the HUP output should light and
the head should move up. When the head reaches it’s up limit, HUP input should come on, RHD output off and
the cycle repeats with the next length being clamped on by the shuttle, front vise opening and the length being
brought forward to home position.
As mentioned, beside each input and output terminal there is a bank of red LED’s. Each light corresponds to its input
or output. An input LED will light when it’s specic input signal is being received at the PLC and output LED’s will light
when the PLC commands specic outputs. If an output LED is on but the output does not happen, check for voltage at
the specic output wire. If voltage is not present then either the output relay is faulty/stuck or the output (3 amp) fuse has
blown (See fuse information, next page). If a fuse is blown, a shorted directional valve coil (good coil should measure 30
to 40 ohms), shorted noise suppresser at the coil, or shorted wiring could be the cause. If the fuse is good and no output
voltage condition still exists, with the output light on, then the relay is defective. If this is the case the PLC will have to be
returned to the manufacturer for repair. (Contact HYD
.
MECH SERVICE).
To Next Page
