91
End Codes
If an end code of 00 was returned in the response, the command was executed
normally. If the end code is not 00, the desired data will not have been read. Re-
fer to
Section 4-1-2 End Codes
for a description of the other possible end codes
and their meanings.
4-2-15 Alarm
Temperature
Write:
W%
This command is used to set the temperatures for alarm outputs 1 and 2. These
temperatures are set by control point and by alarm.
Doing so will result in an error, and a 01 end code will be returned.
Note
This command cannot be used during autotuning.
Command Formats
The formats for these commands are as shown below. The unit number,
memory bank, control point, and alarm must be specified along with the alarm
temperature. The command format and values allowed for the alarm tempera-
ture vary with the type of sensor, the set temperature range, and the alarm mode.
The allowable values are given in the table following the command formats.
The following format is used with K or J sensors or when the temperature range
for Pt100 or JPt100 sensors is between 0
°
and 500
°
C (32
°
to 932
°
F). In either
case, the alarm temperature is input in four digits (or three numeric digits with a
sign digit) in increments of one degree. Use 2D
hex
as the negative sign.
When Setting Unit is 1
@
0
Unit W
%
Bank Point
CR
Header code
x10
3
x10
2
x10
1
x10
0
Sign (0 or –)
*
Terminator
Data code
00 : Alarm 1
01 : Alarm 2
Alarm setting
FCS
The following format is used with Pt100 or JPt100 sensors when the tempera-
ture range is between –100.0
°
and 200.0
°
C (–148
°
to 392
°
F). In this case, the
alarm temperature is input in five digits (i.e., a sign digit plus four numeric digits)
in increments of one-tenth of a degree. It is not necessary to input the decimal
point, but be sure to consider the decimal point when inputting data. Use 2D
hex
as the negative sign.
When Setting Unit is 0.1
Header code
Sign
x10
2
x10
1
x10
0
x10
–1
(0 or –)
Terminator
Data code
00 : Alarm 1
01 : Alarm 2
@
0
Unit W
%
Bank Point
CR
*
Decimal point
Alarm setting
FCS
Temperature Control Commands (All Controllers)
Section 4-2
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