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
6.4
Command Summary Series 986-989, Chapter 6
CT1A
Cycle Time
? <sp> CT1A <cr>
S.S. relay or open col:
26
Output 1 PID Set A
= <sp> CT1A <sp> data.2 <cr>
0.0 = Burst firing, or
0.1 to 999.9 sec. (time prop)
Mech relay: 5.0 to 999.9 sec.
Default: 1.0 or 10.0 sec.
CT1B
Cycle Time
? <sp> CT1B <cr>
S.S. relay or open col:
39
Output 1 PID Set B
= <sp> CT1B <sp> data.2 <cr>
0.0 = Burst firing (brSt), or
0.1 to 999.9 sec. (time prop)
Mech relay: 5.0 to 999.9 sec.
Default: 1.0 or 10.0 sec.
CT2A
Cycle Time
? <sp> CT2A <cr>
S.S. relay or open col:
32
Output 2 PID Set A
= <sp> CT2A <sp> data.2 <cr>
0.0 = Burst firing (brSt), or
0.1 to 999.9 sec. (time prop)
Mech relay: 5.0 to 999.9 sec.
Default: 1.0 or 10.0 sec.
CT2B
Cycle Time
? <sp> CT2B <cr>
S.S. relay or open col:
45
Output 2 PID Set B
= <sp> CT2B <sp> data.2 <cr>
0.0 = Burst firing (brSt), or
0.1 to 999.9 sec. (time prop)
Mech relay: 5.0 to 999.9 sec.
Default: 1.0 or 10.0 sec.
DATE
Factory
? <sp> DATE <cr>
xxyy
122
Test Date
xx = week
yy = year
DBA
Deadband
? <sp> DBA <cr>
-999
°
F to 999
°
F
33
PID Set A
= <sp> DBA <sp> data.2 <cr>
-555
°
C to 555
°
C
-999 units to 999 units
Default: 0
°
F, 0
°
C, or 0 units
DBB
Deadband
? <sp> DBB <cr>
-999
°
F to 999
°
F
46
PID Set B
= <sp> DBB <sp> data.2 <cr>
-555
°
C to 555
°
C
-999 units to 999 units
Default: 0
°
F, 0
°
C, or 0 units
DE1A
Derivative
? <sp> DE1A <cr>
0.00 to 9.99 minutes
25
Output 1 PID Set A
= <sp> DE1A <sp> data.2 <cr>
Default: 0.00
DE2A
Derivative
? <sp> DE2A <cr>
0.00 to 9.99 minutes
31
Output 2 PID Set A
= <sp> DE2A <sp> data.2 <cr>
Default: 0.00
DE1B
Derivative
? <sp> DE1B <cr>
0.00 to 9.99 minutes
38
Output 1 PID Set B
= <sp> DE1B <sp> data.2 <cr>
Default: 0.00
DE2B
Derivative
? <sp> DE2B <cr>
0.00 to 9.99 minutes
44
Output 2 PID Set B
= <sp> DE2B <sp> data.2 <cr>
Default: 0.00
DEC1
Decimal Point
? <sp> DEC1 <cr>
0 = Decimal point 0
48
Process Input 1
= <sp> DEC1 <sp> data.2 <cr>
1 = Decimal point 0.0
2 = Decimal point 0.00
3 = Decimal point 0.000
Default: 0
DEC2
Decimal Point
? <sp> DEC2 <cr>
0 = Decimal point 0
56
Process Input 2
= <sp> DEC2 <sp> data.2 <cr>
1 = Decimal point 0.0
2 = Decimal point 0.00
3 = Decimal point 0.000
Default: 0
DEV
Process Deviation
? <sp> DEV <cr>
Difference between SP1 and C1
5
Display Loop (IN 1)
DFL
Default Unit Type
? <sp> DFL <cr>
0 = US units
140
= <sp> DFL <sp> data.2 <cr>
1 = Standard International units
DIAG
Lockout
? <sp> DIAG <cr>
0 = No lockout
120
Diagnostics Menu
= <sp> DIAG <sp> data.2 <cr>
1 = Read only
2 = No read or write
Default: 0
Table 6.4 -
CT1A to DIAG
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.