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2.2
MASTER TRACE Chapter 2 Getting Started
To enable a heater circuit, press the [SETPOINTS] key once
to access the Setpoints Operating Values group of mes-
sages. Press [MESSAGE
Ø
] until a message similar to the
following appears:
HEATER ENABLED?
NO
"
Use [VALUE × ] or [VALUE Ø ] keys to toggle Heater 1-1
between YES and NO. When YES is displayed, press
[STORE].
Repeat this process, for the remaining heaters. For example,
to enable heater 1-2, select heater 1-2 first, then press the
[MESSAGE
Ø ] key to display:
HEATER ENABLED?
NO
"
Select YES, then press [STORE] to enable heater 1-2.
Now that we have programmed control addresses and told
the master display which heater circuits are enabled, we can
program setpoints for each control. There are two ways to
do this on a multipoint system. Either go through each
control and program every value or choose a parameter like
temperature and program each control with that parameter
before proceeding with the next item.
2.3 Enter Setpoints
2.3.1 Program Enable: Since the heater control display and
keypad are normally accessible to passers-by who may wish
to read measured values, a program disable feature is used
to prevent accidental changes to the setpoints. So before
any setpoints can be entered, the PROGRAM ENABLE dip
switch must be set in the ENABLE position. These dip
switches are located on both the ML100 and MR100 dis-
play modules. Refer to figure 5.9 and 5.10 for the location of
the dip switch.
When programming is complete, the PROGRAM ENABLE
dip switch should be returned to the DISABLE position to
prevent accidental changes to the setpoint.
If you try and store a setpoint without the dip switch in the
ENABLE position the setpoint will not be saved and this
message will flash on the screen:
NOT STORED
PROG DISABLED
Now that the Master
Trace
™ control is ready for program-
ming, we will enter the setpoints for this example. For fur-
ther information about the organization of all the messages
or for details on the range and application of each message
see
Appendix A
. It is not necessary to enter setpoints in
any particular order and any setpoint can be changed later.
2.3.2 Temperature Units °C/°F: Temperature values can be
displayed in degrees Celsius or Fahrenheit. In order to en-
ter values in preferred units this selection will be entered
first.
Press the [SETPOINTS] key 3 times for System Setup mode
and [MESSAGE
Ø ] until the following message is displayed:
TEMPERATURE
UNITS: Celsius
Press the [VALUE
×
] or [VALUE
Ø
] key to toggle selection
between Celsius and Fahrenheit. When Celsius is displayed
press [STORE]. A brief message appears:
SETPOINT
STORED
Then the message reverts back to the previously entered
value for verification. If instead you get the message:
NOT STORED -
PROG DISABLED
then the PROGRAM ENABLE dip switch has not been set
to the ENABLE position. This must be done to proceed
with setpoint programming.
Assuming the setpoint was stored, all values will be dis-
played in °C. Temperature values can automatically be con-
verted to °F at any time by selecting Fahrenheit using the
Temperature Units message.
2.3.3 ASSIGN HEATER NAME: To assist operators in trou-
bleshooting, each Master
Trace
™ control can be pro-
grammed with a heater name. Up to 16 characters can be
assigned to the name of each heater in a system. The same
name can be used with different heaters although a unique
name is preferable for clarity.
Press [SETPOINTS] twice to enter the Heater Setup group
of setpoints. Press the [MESSAGE
Ø ] key until the heater
name message appears: