20
P/N 69761 rev. B
Banner Engineering Corp.
•
Minneapolis, U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
PICO-GUARD Controller
Instruction Manual
4.3 Resetting the Controller
The System Reset input is separate and operates independently
from the USSI 1 Reset input.
System resets
are needed in the following situations:
•
For Manual Power-up operation,
system resets are required
after each controller power-up.
•
For Latch Output operation,
a system reset is required after
each optical channel latch condition occurs.
•
To recover from a Lockout condition
(except USSI 1 input
errors), a system reset is required after the cause of the
lockout has been corrected.
USSI 1 resets
are needed after a stop signal from the external
stop device on USSI 1 input has been cleared (both channels of
USSI 1 are closed/ON).
4.3.1 System Reset Procedure
The PICO-GUARD controller has a System Reset input (terminal
23), that allows the system to be manually reset. To reset the
system, close the System Reset switch for 1/4 to 2 seconds,
then open it. (If Reset switch model MGA-KS0-1, listed in
Section 2, is used, close the switch by turning the key 1/4 turn
clockwise; open it by turning the key counterclockwise, back to
its original position.)
NOTE: Closing the Reset switch too long will cause the system
to ignore the reset request; the switch must be closed at
least 1/4 second,
but no longer than 2 seconds.
4.3.2 USSI 1 Reset Procedure
The PICO-GUARD controller has a USSI 1 Reset input (terminal
1) that allows the system to be manually reset from a USSI
1 latch. To reset the system, close the USSI 1 Reset switch
for 1/4 to 2 seconds, then open it. (If Reset switch model
MGA-KS0-1, listed in Section 2, is used, close the switch by
turning the key 1/4 turn clockwise; open it by turning the key
counterclockwise, back to its original position.)
NOTE: Closing the USSI 1 Reset switch too long will cause the
system to ignore the reset request; the switch must be
closed at least 1/4 second,
but no longer than 2 seconds.
4.4 Status Indicators
A variety of controller status indicators clearly show the
system’s status and operating conditions (see Figure 4-3).
4.5 Normal Operation
4.5.1 System Power-Up
The controller will power up in one of two ways, depending
on the Auto/Man configuration setting. If the controller is set
for Auto Power-Up, it will power up and reset automatically; if
it is set for Manual Power-Up, a system reset procedure will
be required after power-up (System Reset indicator double-
flashes). See Section 4.5.5.
Auto Power-Up:
When power is applied, the controller will
conduct self-tests to detect critical internal faults, determine
configuration settings, and prepare the system for operation.
(If a critical fault is detected, the OSSD outputs remain OFF
and diagnostic information is displayed via the controller’s
status indicators.) If no faults are detected, the controller
will automatically begin normal operation. No system reset
procedure is required.
Manual Power-Up:
When power is applied, the controller will
conduct self-tests to detect critical internal faults, determine
configuration settings, and prepare the system for operation.
(If a critical fault is detected, the OSSD outputs remain OFF
and diagnostic information is displayed via the controller’s
status indicators.) If no faults are detected, the controller will
double-flash the System Reset indicator to indicate it is ready
and waiting for a system reset. After a valid system reset, the
system will begin normal operation.
4.5.2 Inputs and Outputs
Trip Output Configuration (or Automatic Reset):
If any optical
channel becomes open (blocked) while the system is running
with Trip output selected, the OSSD outputs turn OFF within
13 milliseconds (the maximum optical channel response
time). If all of the active (ON) optical channels then become
closed (clear) and USSI 1 and USSI 2 are not in a Latch or
Stop condition, the OSSD outputs come back ON. No resets
of any kind are needed; all required machine control resets are
provided by the machine control circuit.
Latch Output Configuration (or Monitored Manual Reset):
If
any optical channel becomes open (blocked) while the System
is running with Latch output selected, the OSSD outputs turn
OFF within 13 milliseconds (the maximum optical channel
response time). If all of the active (ON) optical channels
then become closed (clear), the Channel status indicators of
channels that have not been blocked since the last reset will
be Green (indicators of disabled channels will be OFF), the
indicators of the channels that have been blocked but are clear
again are double flashing, and the System Reset indicator will
single-flash, indicating the controller is waiting for a system
reset to clear the latch condition. When Latch is selected, the
outputs come back ON only when all active channels are clear
and after a system reset. The controller will wait for a system
reset; when a valid system reset signal is received and all
active channels remain clear/closed and USSI 1 and USSI 2 are
not in a Latch or Stop condition, the OSSD outputs turn ON.
System Operation
