5
5-15
GFK-0121E Chapter 5 Monitoring the Bus and its Devices
Monitoring/Controlling Field Control Data
The HHM can display diagnostics and current I/O
states, and force and unforce individual I/O points
on Field Control modules.
1. From the HHM Main Menu, display the Field
Control main menu.
F 1 : M o n i t o r
F 2 : C o n f i g u r a t i o n
A. If the BIU or Field Processor is the active de-
vice, press either F3 (Configuration) or F2
(analyze) twice.
B. If it is NOT the active device select F2 (ana-
lyze) then F3 (Block/Bus Status).
Press the F1 (nxt) or F2 (prev) key re-
peatedly to reach the serial bus address
of the BIU/Field Processor. Press F3 to
make it the active device.
Then, press ∆Menu, followed by F2
(Monitor/Control Ref).
2. Press F1 (Monitor). This menu appears:
F 1 : M o n i t o r I / O
F 2 : F a u l t s
F 3 : P r e v i o u s M e n u
3. Select F1 (monitor I/O) to display the Monitor
screen for the first %I reference.
Reference
being
monitored Current
state or value
Indicates force is in effect
< > f r c h e x
IOOOO1*OB
Changing the Reference Type Being Displayed
Use the F1 ( < ) key to select a reference type: I
(discrete inputs), Q (discrete outputs), AQ (analog
outputs), or AI (analog inputs).
Displaying Another Reference
Use the F2 ( > ) key to advance through the point
reference screens for the selected reference type.
Changing the Display Mode
The letter in the upper right corner of the display
shows the present data type:
B binary
Hhex
D decimal
Use the F4 (mode) key if you want to change the
display data type.
Returning to the Previous Menu
Press the HHM Clear key when you want to
return to the main Field Control menu.
Forcing/Unforcing the Displayed Reference
I/O points can be forced and unforced from the
Hand-held Monitor (the HHM’s circuit forcing
capability must be enabled to use this function).
Forcing an I/O point changes its state in the Field
Processor’s EEPROM memory. If the circuit is an
output, the physical state of the output also
changes. If the circuit is an input, the forced input
data is sent to the CPU. A circuit retains its forced
state or value if power is removed. The forced
circuit ignores data from an attached input device,
or output data from the CPU. The force can
ONLY be removed from the Hand-held Monitor.
1. If the display is set to hex (H) or binary (B),
change it to decimal (D) by pressing F4.
2. Press the F3 (force) key to force the reference
now being displayed.
f r c u n f r c
IOOOO1*1 D
3. Press F3 (force) again. Then, enter the forced
state or value. The HHM displays an asterisk to
indicate the state of value now shown is forced.
See the illustration at left.
4. Use the F4 (unforce) key from the same screen
when you want to unforce the point.