Johnson Controls FMS-1655M, Руководство по установке

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FMS-1655M
LIT-12013119
16
The set brightness option on the
Display
Setup
menu allows the intensity of the
display backlighting to be adjusted from
very dim to very bright. The brightness
settings are saved in nonvolatile memory
and remain in effect through a power
cycle.
Adding password security
Access to the FMS-1655M Monitor
menu system can be protected from
unauthorized tampering through the
multi-level security passwords. Up to ten
individual passwords may be entered in
the system, each with a specific access
level. A password entry may be created
by selecting the
Passwords Setup
option
from the
System Setup
menu, and then
selecting add password. The user is
prompted to enter a minimum of four and
up to eight numeric digits.
Once a password has been specified, the
user is prompted to specify one of four
access levels: Unrestricted, Standard,
Basic, and Restricted. All password
entries are saved to non-volatile memory,
and remain in effect through a power
failure. In the event that a password has
been forgotten, there is a factory-default
“back door” password that will provide
unrestricted access to the user menu
system. Please consult with the factory for
more information regarding this password.
Note: An unrestricted password must
be created first before any restricted
passwords can be set.
Resetting Sensor Zero Offset
The FMS-1655M Monitor’s remote sensor
can have its zero offset reset to the
factory calibrated default in the event the
monitored pressure does not approach
zero when the door to the monitored
room is opened. Select the
Reset Zero
Offset
option on the
Diagnostics
menu
to begin the procedure. once the reading
stabilizes, click the OK button to proceed.
Exit to the main display and verify that the
reading goes to zero. If not, repeat the
above procedure.
Remote monitoring the FMS-1655M
Monitor
The FMS-1655M Monitor provides native
support for BACnet® MS/TP protocol over
a RS-485 serial port located on the FMS-
1655M Monitor user interface display at
CN7, a 3 pin pluggable terminal block at
back of display (see page 19). The FMS-
1655M Monitor is able to communicate
11 points of information to the building
management system. See page 18 for list
of BACnet® points. The network settings
are easily configured by selecting the
Network Setup
option from the
Unit
Setup
menu. As an alternate means
of remote monitoring, a 4-20mA signal
representing the room DP is available
for connecting to a third party controller
on the BMS. It is located at the green
terminal block on the remote sensor
and labeled as “Io.”
PID output setup
The FMS-1655M Monitor has an analog
output which can be used to control a
damper actuator for closed loop control of
the room differential pressure. This analog
output is present at the 9 pin connector
on remote sensor and can be configured
for a 0-10Vdc or 2-10Vdc output through
the touchscreen display menu. Go to
PID
Output
option in
Room Setup
of
Unit
Setup
menu. Select PID Output Setup,
set operating mode, and output range.
Touch Finish to save settings and exit
back to PID Output Setup menu. If
necessary the PID loop parameters can
be changed by selecting the PID Loop
Setup option where the Proportional,
Integral, & Derivative values can be tuned
for the optimum control loop response.
For most typical applications, PID factory
settings work well.
Editing setpoints
When the FMS-1655M Monitor is used
as a controller, the target differential
pressure setpoints can be set by selecting
the
Room Setup
option in the
Unit Setup
menu. There the
Edit Setpoint
option can
be selected and the setpoints for Positive,
Negative, and Neutral isolation can be set
as well as a deadband.
Diagnostic menu
The FMS-1655M monitor incorporates
several troubleshooting tools. The
Override PID Output option allows the
analog output to be overridden and
locked while test and balance makes
adjustments to the Supply and Exhaust
dampers. While in the overridden state,
the analog output is “disconnected” from
the PID control loop, if enabled. The
Real-Time View option allows the user to
see in real time the actual values for the
Pressure, Setpoint, PID Output, and Door
Status. A software reset can be invoked
through the Reset Monitor option. It is
recommended to perform this function
after installation to insure that all user
settings are properly stored to nonvolatile
memory.