Watlow Series 988 Family - Manual (Page 54)

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
6.10 Command Summary Series 986-989, Chapter 6
PID2 PID Set Crossover ? PID2 0 = Process
101 Source Selection = PID2 data.2 1 = Set point
2 = None
Default: 0
PRC1 Process Range ? PRC1 0 = 4-20mA
68 Output 1 = PRC1 data.2 1 = 0-20mA
2 = 0-5V
Î (dc)
3 = 1-5V Î (dc)
4 = 0-10V Î (dc)
Default: 0
PRC2 Process Range ? PRC2 0 = 4-20mA
71 Output 2 = PRC2 data.2 1 = 0-20mA
2 = 0-5V
Î (dc)
3 = 1-5V Î (dc)
4 = 0-10V Î (dc)
Default: 0
PRC3 Process Range ? PRC3 0 = 4-20mA
91 Output 3 = PRC3 data.2 1 = 0-20mA
2 = 0-5V
Î (dc)
3 = 1-5V Î (dc)
4 = 0-10V Î (dc)
Default: 0
PROC Process Value for ? PROC RL1 to RH1
102 PID A <-> B Switch = PROC data.2 Default: per IN1 and hardware
PWR Percent Power ? PWR -100% to 100%
6 Present Output n/a
RA1A Rate Output 1 ? RA1A 0.00 to 9.99 minutes
23 PID Set A = RA1A data.2 Default: 0.00
RA1B Rate Output 1 ? RA1B 0.00 to 9.99 minutes
36 PID Set B = RA1B data.2 Default: 0.00
RA2A Rate Output 2 ? RA2A 0.00 to 9.99 minutes
29 PID Set A = RA2A data.2 Default: 0.00
RA2B Rate Output 2 ? RA2B 0.00 to 9.99 minutes
42 PID Set B = RA2B data.2 Default: 0.00
RE1A Reset Output 1 ? RE1A if ALGO = 0, 1, or 3, then
22 PID Set A = RE1A data.2 0.00 to 9.99 repeats/min.
if ALGO = 2, then -100.0% to 100.0%
Default: 0.00 repeats/min. or 0.0%
RE1B Reset Output 1 ? RE1B if ALGO = 0, 1, or 3, then
35 PID Set B = RE1B data.2 0.00 to 9.99 repeats/min.
if ALGO = 2, then -100.0% to 100.0%
Default: 0.00 repeats/min. or 0.0%
RE2A Reset Output 2 ? RE2A if ALGO = 0, 1, or 3, then
28 PID Set A = RE2A data.2 0.00 to 9.99 repeats/min.
if ALGO = 2, then -100.0% to 100.0%
Default: 0.00 repeats/min. or 0.0%
RE2B Reset Output 2 ? RE2B if ALGO = 0, 1, or 3, then
41 PID Set B = RE2B data.2 0.00 to 9.99 repeats/min.
if ALGO = 2, then -100.0% to 100.0%
Default: 0.00 repeats/min. or 0.0%
RH1 Range High ? RH1 min. IN1 range to to max. IN1 range
50 Input 1 = RH1 data.2 Default: Sensor high range
RH2 Range High ? RH2 min. IN2 range to to max. IN2 range
58 Input 2 = RH2 data.2 Default: Sensor high range
Table 6.10 -
PID2 to RH2
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.)