Honeywell Excel 800 SYSTEM Installation And Commissioning Instructions page 59

Excel 800
Configured Floating Relay Output
If a floating relay output has been configured, the following
applies:
The corresponding manual override can be used to adjust
the respective floating actuator so that it drives to any
desired position between fully closed (0%) and fully open
(100%). The "open" relay or "closed" relay – as the case
may be – is then switched ON for the time the actuator
requires to drive to the desired position, whereupon it will
stop. This required time depends upon the configured motor
runtime (time to open / time to close,) while the direction of
movement is dependent upon the configured direct/reverse
setting.
Unconfigured Floating Relay Output
0 100 0
AUTO AUTO
RELAY "N" CLOSED
BOTH RELAYS OFF
RELAY "N+1" OPEN
ACTUATOR STOPS
ACTUATOR CLOSES
Fig. 84. Use of manual override (floating relay output
unconfigured)
If a floating relay output has not been configured (see Fig.
84), the following applies:
Although the motor runtime is unknown to the XFR825, the
corresponding manual override can be used during the
commissioning phase to adjust the respective floating
actuator so that it drives to any desired position between
fully closed (0%) and fully open (100%).
The "open" relay (relay "n," i.e. "1," "3," or "5") and the
"closed" relay (relay "n+1," i.e. "2," "4," or "6") are then
switched ON and/or OFF, respectively, when the
corresponding manual override is set to "0...100%."
Specifically, the actuator will drive towards its closed
position as long as the manual override is set to "0...50%,"
and it will drive towards its open position as long as it is set
to "50...100%." Setting the manual override to "AUTO"
stops the actuator.
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.
50 50
100 0 100
AUTO
RELAY "N" OPEN
RELAY "N+1" CLOSED
ACTUATOR OPENS
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Description of the I/O Modules
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