Name
Description
Read (?) and/or Write (=) Syntax
Range
data.1
data.2
Modbus
Address
Ramping Controller Prompt Table
981,
982,
983, 984
Data Communications with the Watlow Series 988 Family
Command Summary Series 981-984, Chapter 5
5.8
LOC
Keyboard Lockout
? <sp> LOC <cr>
0 = No lockout
1300
= <sp> LOC <sp> data.2 <cr>
1 = Lock out PID Menu and auto-tune
prompt
2 = Lock out System, PID and Program
Menus
3 = Lock out System, PID and Program
Menus; and set point 1 slewing
Default: 0
LOP
Low Power Limit
? <sp> LOP <cr>
-100% to HiP (%)
715
= <sp> LOP <sp> data.2 <cr>
Default: -100% (heat/cool)
Default: 0% (heat only)
LRNH Learn High Slide-
? <sp> LRNH <cr>
0 = No function
1907
wire Resistance
= <sp> LRNH <sp> data.2 <cr>
1 = Learn
Default: 0
LRNL
Learn Low Slide-
? <sp> LRNL <cr>
0 = No function
1906
wire Resistance
= <sp> LRNL <sp> data.2 <cr>
1 = Learn
Default: 0
MDL
Model Number
? <sp> MDL <cr>
982 (981-984 ramping unit)
0
MOD
Mode Key Action
= <sp> MOD <sp> data.2 <cr>
0 = Mode to previous prompt
1900
1 = Mode to next prompt
MTR
Monitor the
? <sp> MTR <cr>
See Key Command, "MTR," at the
1200
currently running
end of this chapter for full response
step.
syntax.
This key command
responds with all
step information for
these step types:
• Set Point (time)
• Set Point (rate)
• Soak
These step types
have zero-time
duration; they will
never respond
to an MTR query:
• Jump-loop
• Link File
• End Step
OT1
Output 1 Action
? <sp> OT1 <cr>
0 = Heat
700
= <sp> OT1 <sp> data.2 <cr>
1 = Cool
OT2
Output 2 Action
? <sp> OT2 <cr>
0 = Heat
717
= <sp> OT2 <sp> data.2 <cr>
1 = Cool
2 = None
3 = Alarm 2
4 = Alarm 2 reverse acting
OT3
Output 3 Action
? <sp> OT3 <cr>
0 = None
734
= <sp> OT3 <sp> data.2 <cr>
1 = Alarm 3
2 = Alarm 3 reverse acting
3 = Event 3 (ENT3)
Table 5.8 -
LOC to OT3
ç
CAUTION:
Avoid writing <=>
continuously, such
as ramping set
points or repetitive
loops, to the
Series 981-984
EEPROM memory.
Continuous writes
may result in
premature control
failure, system
downtime and
damage to pro-
cesses and
equipment.
NOTE:
The number of
decimal places
returned by many
of these com-
mands is deter-
mined by the DEC1
or IN1 setting.
