
V6.230 20131017
76
This
will
set
ALTERNATE=1-2.
Type
2
to
ALTERNATE=1-3,
3
to
ALTERNATE=1-4, 4 to ALTERNATE=2-3, 5 to ALTERNATE=2-4, or 6 to
ALTERNATE=3-4. Type 0 to disable alternate.
NOTE: Outputs 5, 6, 7, and 8 cannot be set to alternate
.
4.12 Auto and Manual Control
The TTC-1000 supports direct manual control of any output relay directly from
the front panel. When commanded ON, the relay picks up and commanded OFF
the relay drops out. Manual control is important for two reasons. First, it gives the
user a simple method to test the connections to the output relays when
commissioning the unit. Second, it gives the user the ability to manually override
both automatic or remote control should the operator desires to command
cooling on a continuous basis. It can also be used to prevent an output from
picking up.
Manual mode can be exerted by communicating through the RS-232 interface,
but it is not possible to control the output relay using this method. This setting
should only be used when it is desired block remote control of a specific output
relay. Also, the TTC-1000 will leave the output relay in whatever state it
happened to be at the time manual control is exerted through the RS-232
interface.
The TTC-1000 will cause the Device Alarm contacts to pick up when an output is
put into the manual mode. In addition the ALARM LED on the front panel will
illuminate. The user can block this alarm by using the manual mode alarm
disable setting shown in Section 4.14.
Once in Manual Mode any output relay will be de-energized if power is removed
upon re-energization. The output remains in Manual Mode and cannot be re-
energized without physically going to the device and turning the output on in the
manual mode.
Setting OUT1 from the front panel, enter the Configuration menu and press the
or
arrow button until the setting 002 is displayed:
Press the
YES
button. The first character will flash. Use the
or
arrow buttons
to scroll between MAN OFF, MAN ON or AUTO.
PRGM SETTING 002
O U T 1 C T R L = A U T O
Содержание TTC-1000
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