User guide

Temperature/process Controller Prompt Table
986, 987,
988, 989
Data Communications with the Watlow Series 988 Family
6.5
Command Summary Series 986-989, Chapter 6
Name Description Read (?) and/or Write (=) Syntax Range
data.1 data.2
Modbus
address
EI1 Event Input 1 ? <sp> EI1 <cr> Software Revision
11 Function = <sp> EI1 <sp> data.2 <cr> thru M N and later
0 0 = Switch PID Sets
1 1 = None
2 2 = Lock out keyboard
3 3 = Alarm reset
N/A 4 = Auto/manual select
4 5 = Turn control outputs off
5 6 = Reverse Output 1
6 7 = Activate Idle Set Point
7 8 = Activate Remote Set Pt
Default: 1
EI1S Event Input 1 Status ? <sp> EI1S <cr> 0 = off (open)
104 1 = on (closed)
EI2 Event Input 2 ? <sp> EI2 <cr> Software Revision
12 Function = <sp> EI2 <sp> data.2 <cr> thru M N and later
0 0 = Switch PID Sets
1 1 = None
2 2 = Lock out keyboard
3 3 = Alarm reset
N/A 4 = Auto/manual select
4 5 = Turn control outputs off
5 6 = Reverse Output 1
6 7 = Activate Idle Set Point
7 8 = Activate Remote Set Pt
Default: 1
EI2S Event Input 2 Status ? <sp> EI2S <cr> 0 = off (open)
105 1 = on (closed)
ER Error, Analog Input ? <sp> ER <cr> 0 = No error
4 (Multiple errors 1 = Input 1 A-D overflow
possible.) 2 = Input 1 overrange
3 = Input 1 underrange
4 = Input 1 A-D underflow
5 = Input 2 A-D overflow
6 = Input 2 overrange
7 = Input 2 underrange
8 = Input 2 A-D underflow
9 = Ambient error
10 = Heater
11 = Open loop
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
97 Latching Enable = <sp> ERR <sp> data.2 <cr> 1 = Errors non-latching
Default = 1
FAIL Sensor Failure ? <sp> FAIL <cr> Bumpless = LOP - 1%
96 Output Function = <sp> FAIL <sp> data.2 <cr> Heat/cool manual = -100 to 100%
Heat only manual = 0% to 100%
Cool only manual = -100% to 0%
Default = Bumpless
Table 6.5 -
EI1 to FAIL
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.
(This does not
apply to Modbus
Protocol.)