User guide

Temperature/process Controller Prompt Table
986, 987,
988, 989
Data Communications with the Watlow Series 988 Family
6.9
Command Summary Series 986-989, Chapter 6
Name Description Read (?) and/or Write (=) Syntax Range
data.1 data.2
Modbus
address
OT3 Output 3 Action ? <sp> OT3 <cr> 0 = None
78 = <sp> OT3 <sp> data.2 <cr> 1 = Alarm 3
2 = Alarm 3 reverse acting
OTPT Lockout Output ? <sp> OTPT <cr> 0 = No lockout
117 Menu = <sp> OTPT <sp> data.2 <cr> 1 = Read only
2 = No read or write
Default: 0
OTY1 Output 1 Hardware ? <sp> OTY1 <cr> 0 = None
132 1 = SSR 0.5A
OTY2 Output 2 Hardware ? <sp> OTY2 <cr> 2 = SSR 0.5A with suppression
133 6 = Switched dc
OTY3 Output 3 Hardware ? <sp> OTY3 <cr> 8 = Relay 5A Form C
134 9 = Relay 5A Form C with suppr.
OTY4 Output 4 Hardware ? <sp> OTY4 <cr> 10 = Relay 5A Form A/B
135 11 = Relay 5A Form A/B with suppr.
13 = Process output
14 = Voltage retransmit
15 = Current retransmit
16 = Power supply
17 = Comms EIA-232
18 = Comms EIA -485 / EIA-422
19 = Comms EIA-485 / EIA-232
PB1A Proportional Band ? <sp> PB1A <cr> if DFL = 0, then 0 to 9999
21 Output 1 PID Set A = <sp> PB1A <sp> data.2 <cr> if DFL = 1, then 0.0 to 99.9% of span
Default: 25°F, 14°C, 25 units or 3.0%
PB1B Proportional Band ? <sp> PB1B <cr> if DFL = 0, then 0 to 9999
34 Output 1 PID Set B = <sp> PB1B <sp> data.2 <cr> if DFL = 1, then 0.0 to 99.9% of span
Default: 25°F, 14°C, 25 units or 3.0%
PB2A Proportional Band ? <sp> PB2A <cr> if DFL = 0, then 0 to 9999
27 Output 2 PID Set A = <sp> PB2A <sp> data.2 <cr> if DFL = 1, then 0.0 to 99.9% of span
Default: 25°F, 14°C, 25 units or 3.0%
PB2B Proportional Band ? <sp> PB2B <cr> if DFL = 0, then 0 to 9999
40 Output 2 PID Set B = <sp> PB2B <sp> data.2 <cr> if DFL = 1, then 0.0 to 99.9% of span
Default: 25°F, 14°C, 25 units or 3.0%
PIDA Lockout PID Set A ? <sp> PIDA <cr> 0 = No lockout
114 Menu = <sp> PIDA <sp> data.2 <cr> 1 = Read only
2 = No read or write
Default: 0
PIDB Lockout PID Set B ? <sp> PIDB <cr> 0 = No lockout
115 Menu = <sp> PIDB <sp> data.2 <cr> 1 = Read only
2 = No read or write
Default: 0
Table 6.9 -
OT3 to PIDB
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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.)