Honeywell Excel 800 SYSTEM Installation And Commissioning Instructions page 54

Description of the I/O Modules
Manual Override in the AUTO Position
When a manual override of the ... R 824 Relay Output
Module is set to the "AUTO" position, and the corresponding
relay output has been configured, the following applies:

If the L W network is functioning properly, the
ON ORKS
logical status of the relay output will be "AUTO."

If the L W network is not functioning properly, the
ON ORKS
feedback signal will be switched to the safety position
value.

The feedback signal on the L
nvoDoActPosnFb[ ] will have a value of either 0% or
100%, and a state of -1.

The status LED (yellow) will indicate the actual logical
state of the relay output as commanded (by
nviDoSwitch[ ]).
When a manual override of the ... R 824 Relay Output
Module is set to the "AUTO" position, and the corresponding
relay output has not been configured, the following applies:

Regardless as to whether the L
functioning properly or not, values from the L
Bus will be ignored, and there will be no heartbeat or
safety position.

The feedback signal on the L
nvoDoActPosnFb[ ] will have a value of 0% and a state
of 0.

The status LED will be unlit.
EN1B-0375GE51 R0910
W network:
ON ORKS
W network is
ON ORKS
W
ON ORKS
W network:
ON ORKS
Manual Override in the ON Position
When a manual override of the ... R 824 Relay Output
Module is set to the "ON" position, the following applies:

If the relay output has been configured, its logical state
will depend upon the actual output configuration.

If the relay output is unconfigured, it will be switched ON.

Regardless of configuration, the feedback signal on the
L W network: nvoDoActPosnFb[ ] will have a
ON ORKS
value of 1000...0% and a state of -1.

Regardless of configuration, the status LED (yellow) will
flash to indicate "manual override."
Manual Override in the OFF Position
When a manual override of the ... R 824 Relay Output
Module is set to the "OFF" position, the following applies:

If the relay output has been configured, its logical state
will depend upon the actual output configuration.

If the relay output is unconfigured, it will be switched
OFF.

Regardless of configuration, the feedback signal on the
L W network: nvoDoActPosnFb[ ] will have a
ON ORKS
value of 0% (direct) or 100% (reverse) and a state of -1.

Regardless of configuration, the status LED (yellow) will
flash to indicate "manual override."
Note
Panel Bus I/O modules feature watchdog functionality. Con-
sequently, if the module's firmware stops running (due, e.g.,
to updating), the watchdog will switch OFF the module's
outputs – even if the corresponding manual overrides (if
present) have been set to ON. Thus, the manual overrides
should NOT be thought of as emergency overrides; rather,
they are subordinate to the given Panel Bus I/O module's
processor and firmware.
54
Excel 800