Watlow 988 series - 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 ? <sp> PID2 <cr> 0 = Process
101 Source Selection = <sp> PID2 <sp> data.2 <cr> 1 = Set point
2 = None
Default: 0
PRC1 Process Range ? <sp> PRC1 <cr> 0 = 4-20mA
68 Output 1 = <sp> PRC1 <sp> data.2 <cr> 1 = 0-20mA
2 = 0-5VÎ (dc)
3 = 1-5VÎ (dc)
4 = 0-10VÎ (dc)
Default: 0
PRC2 Process Range ? <sp> PRC2 <cr> 0 = 4-20mA
71 Output 2 = <sp> PRC2 <sp> data.2 <cr> 1 = 0-20mA
2 = 0-5VÎ (dc)
3 = 1-5VÎ (dc)
4 = 0-10VÎ (dc)
Default: 0
PRC3 Process Range ? <sp> PRC3 <cr> 0 = 4-20mA
91 Output 3 = <sp> PRC3 <sp> data.2 <cr> 1 = 0-20mA
2 = 0-5VÎ (dc)
3 = 1-5VÎ (dc)
4 = 0-10VÎ (dc)
Default: 0
PROC Process Value for ? <sp> PROC <cr> RL1 to RH1
102 PID A <-> B Switch = <sp> PROC <sp> data.2 <cr> Default: per IN1 and hardware
PWR Percent Power ? <sp> PWR <cr> -100% to 100%
6 Present Output n/a
RA1A Rate Output 1 ? <sp> RA1A <cr> 0.00 to 9.99 minutes
23 PID Set A = <sp> RA1A <sp> data.2 <cr> Default: 0.00
RA1B Rate Output 1 ? <sp> RA1B <cr> 0.00 to 9.99 minutes
36 PID Set B = <sp> RA1B <sp> data.2 <cr> Default: 0.00
RA2A Rate Output 2 ? <sp> RA2A <cr> 0.00 to 9.99 minutes
29 PID Set A = <sp> RA2A <sp> data.2 <cr> Default: 0.00
RA2B Rate Output 2 ? <sp> RA2B <cr> 0.00 to 9.99 minutes
42 PID Set B = <sp> RA2B <sp> data.2 <cr> Default: 0.00
RE1A Reset Output 1 ? <sp> RE1A <cr> if ALGO = 0, 1, or 3, then
22 PID Set A = <sp> RE1A <sp> data.2 <cr> 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 ? <sp> RE1B <cr> if ALGO = 0, 1, or 3, then
35 PID Set B = <sp> RE1B <sp> data.2 <cr> 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 ? <sp> RE2A <cr> if ALGO = 0, 1, or 3, then
28 PID Set A = <sp> RE2A <sp> data.2 <cr> 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 ? <sp> RE2B <cr> if ALGO = 0, 1, or 3, then
41 PID Set B = <sp> RE2B <sp> data.2 <cr> 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 ? <sp> RH1 <cr> min. IN1 range to to max. IN1 range
50 Input 1 = <sp> RH1 <sp> data.2 <cr> Default: Sensor high range
RH2 Range High ? <sp> RH2 <cr> min. IN2 range to to max. IN2 range
58 Input 2 = <sp> RH2 <sp> data.2 <cr> 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.