Watlow Series 988 Family - Manual (Page 52)

Data Communications with the Watlow Series 988 Family
Temperature/process Controller Prompt Table
986, 987,
988
, 989
Name Description Read (?) and/or Write (=) Syntax Range
data.1 data.2
Modbus
address
6.8 Command Summary Series 986-989, Chapter 6
ITY2 Input 2 ? ITY2 0 = None
131 Hardware Type 1 = t/c only
2 = Current
3 = Slide wire
4 = Input off
5 = Universal RTD
6 = Universal high gain t/c
7 = Universal low gain t/c
8 = Universal millivolts
9 = Universal process
10 = Event input
LAT2 Alarm 2 Latching ? LAT2 0 = Latching alarms
76 = LAT2 data.2 1 = Non-latching alarms
Default: 1
LAT3 Alarm 3 Latching ? LAT3 0 = Latching alarms
82 = LAT3 data.2 1 = Non-latching alarms
Default: 1
LIN1 Linearization ? LIN1 0 = None
54 Process Input 1 = LIN1 data.2 1 = Square root extraction
Default: 0
LIN2 Linearization ? LIN2 0 = None
64 Process Input 2 = LIN2 data.2 1 = Square root extraction
Default: 0
LOC Keyboard Lockout ? LOC 0 = No lockout
112 = LOC data.2 1 = Lock out mode key
2 = Lock out mode and auto/manual keys
3 = Lock out all single keys
Default: 0
LOP Low Power Limit ? LOP -100% to HIP (%)
107 = LOP data.2 Default: -100% (Heat / cool)
Default: 0% (Heat only)
LRNH Learn High Slide- ? LRNH 0 = No function
62 wire Resistance = LRNH data.2 1 = Learn
Default: 0
LRNL Learn Low Slide- ? LRNL 0 = No function
61 wire Resistance = LRNL data.2 1 = Learn
Default: 0
LR Local-Remote ? LR 0 = Local set point
20 Set Point Select = LR data.2 1 = Remote set point
Default: 0
MDL Model Number ? MDL 988 (986-989 units)
0
OT1 Output 1 Action ? OT1 0 = Heat
67 = OT1 data.2 1 = Cool
OT2 Output 2 Action ? OT2 0 = Heat
70 = OT2 data.2 1 = Cool
2 = None
3 = Alarm 2
4 = Alarm 2 reverse acting
Table 6.8 -
ITY2 to OT2
ç
CAUTION:
Avoid writing <=>
continuously, such
as ramping set
points or repetitive
loops, to the
Series 986-989
EEPROM memory.
Continuous writes
may result in
premature control
failure, system
downtime and
damage to
processes and
equipment.
NOTE:
The number of
decimal places
returned by many
of these
commands is
determined by the
DEC1, DEC2, IN1
or IN2 setting.
(This does not
apply to Modbus
Protocol.)