Socket Mobile GFK0121E - Manual (Page 45)

5
5-9 GFK-0121E
Chapter 5 Monitoring the Bus and its Devices
Monitor/Control Reference Display for a Discrete, Relay, or High-speed Counter Block
For a discrete, Relay, or High-speed Counter block,
the Monitor/Control Reference screen looks like
this:
M N T R / C N T L (reference) I
S T A T E :
N O F A U L T S
> o n o f f r e l e s
O
Line 1 identifies the circuit currently being
monitored. Pressing F1 ( > ) displays other
circuits.
Line 2 shows the state of the circuit. In the
example above, the circuit is OFF and not forced
(no underline). Status is obtained directly from
the block for both inputs and outputs. If the
circuit is an output and no–load sensing is
enabled it reflects the current flow out of the I/O
block to the load, as well as voltage at the field
terminals; otherwise, it indicates only the voltage
at the field terminals (output from the switch).
Forcing an Input or Output
(The Hand-held Monitor’s circuit forcing
capability must be enabled to force or unforce a
circuit). To force a circuit on, press F2 (ON). To
force it off,press F3 (OFF). The force remains until
changed by the HHM (even through loss of block
power). To clear a force, press F4 (reles).
Diagnostics
Line 3 of the Monitor/Control Reference screen
shows whether the circuit has any faults. If it
does, one of the following diagnostic messages
appears:
Failed switch: The commanded state of the circuit
does not match the actual state of the
switch or load.
Loss of I/O power: One pair of circuits on an dis-
crete isolated block is not receiving power.
No load: The load is drawing less than the block’s
minimum current level.
Open wire: An open wire condition has been de-
tected on a tristate input.
Overload: The output exceeds the block’s steady
state current limit.
Overtemperature: The block’s internal tempera-
ture exceeds 100
_
C.
Short circuit: Transient current above the block’s
short circuit limit.
Clearing Circuit Faults
After correcting a fault condition, press the CLEAR
key to remove the message and restore the
reference to normal operation (the Clear Block
Faults function must be enabled to use this
feature). If the fault condition still exists, the fault
message will reappear.