Watlow Series 988 Family - Manual (Page 48)

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