User guide

Name Description Read (?) and/or Write (=) Syntax Range
data.1 data.2
Modbus
Address
996, 997,
998, 999
Dual Channel Controller Prompt Table
Command Summary Series 996-999, Chapter 7
7.5
Data Communications with the Watlow Series 988 Family
ER2 Error, ? <sp> ER2 <cr> 0 = No error
n/a Communications 1 = Transmit buffer overflow
2 = Receive buffer overflow
3 = Framing error
4 = Overrun error
5 = Parity error
6 = Talking out of turn
7 = Invalid reply error
8 = Noise error
20 = Command not found
21 = Prompt not found
22 = Incomplete command line
23 = Invalid character
24 = Number of chars. overflow
25 = Input out of limit
26 = Read only command
27 = Write allowed only
28 = Prompt not active
ERR Error, ? <sp> ERR <cr> 0 = Errors latching
607 Latching Enable = <sp> ERR <sp> data.2 <cr> 1 = Errors non-latching
Default: 1
FAIL Sensor Failure ? <sp> FAIL <cr> Bumpless = LOP - 1%
902 Output Function = <sp> FAIL <sp> data.2 <cr> Heat/cool manual = -100 to 100%
Failure mode can be Heat only manual = 0% to 100%
bumpless transfer Cool only manual = -100% to 0%
or manual (% Power) Default: Bumpless
control. See user’s
manual, Error Code
Actions.
FTR1 Process Input 1 ? <sp> FTR1 <cr> -60 to 60 seconds
604 Filter Time Constant = <sp> FTR1 <sp> data.2 <cr> Default: 0
FTR2 Process Input 2 ? <sp> FTR2 <cr> -60 to 60 seconds
614 Filter Time Constant = <sp> FTR2 <sp> data.2 <cr> Default: 0
GLBL Lockout ? <sp> GLBL <cr> 0 = No lockout
1311 Global Menu = <sp> GLBL <sp> data.2 <cr> 1 = Read only
2 = No read or write
Default: 0
HY1A Output 1A Hysteresis ? <sp> HY1A <cr> 0°F to 999°F
507 = <sp> HY1A <sp> data.2 <cr> 0°C to 555°C
0 units to 999 units
Default: 3°F, 2°C or 3 units
HY1B Output 1B Hysteresis ? <sp> HY1B <cr> 0°F to 999°F
527 = <sp> HY1B <sp> data.2 <cr> 0°C to 555°C
0 units to 999 units
Default: 3°F, 2°C or 3 units
HY2A Output 2A Hysteresis ? <sp> HY2A <cr> 0°F to 999°F
517 = <sp> HY2A <sp> data.2 <cr> 0°C to 555°C
0 units to 999 units
Default: 3°F, 2°C or 3 units
HY2B Output 2B Hysteresis ? <sp> HY2B <cr> 0°F to 999°F
537 = <sp> HY2B <sp> data.2 <cr> 0°C to 555°C
0 units to 999 units
Default: 3°F, 2°C or 3 units
HYS3 Output 3 Hysteresis ? <sp> HYS3 <cr> 0°F to 999°F
737 = <sp> HYS3 <sp> data.2 <cr> 0°C to 555°C
0 units to 999 units
Default: 3°F, 2°C or 3 units
Table 7.5 -
ER2 to HYS3
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CAUTION:
Avoid writing <=>
continuously,
such as ramping
set points or
repetitive loops, to
the Series 996-999
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 com-
mands is deter-
mined by the
DEC1, DEC2, IN1
or IN2 setting.
(This does not
apply to Modbus
Protocol.)