Watlow Electric Revision 5 - Manual (Page 12)

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2.2 OPERATING PARAMETERS
Independently set for each loop through serial interface.
Input type: any standard type (see above), any mix.
Gain: 0 to 255 proportional; 0 to 510 on/off. Proportional
Band: Direct reading in engineering units of the
loop range.
Integral: 0 to 1020 seconds. Reset: .05 to 60 Repeats/Min. [4
sec. resolution].
Derivative: 0 to 255 sec. Rate: .01 to 4.25 Min.
Digital Filter: Averages last 0 to 255 outputs. [0- 127.5 sec. time
constant].
Setpoint: +span. Resolution: 0.01%; 0.1o for T/C.
ANASOFT resolution: 0.1%; 1o for T/C.
Deviation band alarm: 0 to +25% Full Scale; 0 to +250o T/C.
Control output level: Direct or reverse acting, 0-100%.
Manual output: 0 to 100% (0.4% resolution).
2.3 REPORTING PARAMETERS
The computer can request any of the following for any loop:
Operating parameters: all of the above
Analog inputs: measured values
Digital I/O: status
2.4 COMMUNICATIONS
Types:
RS-232 or 20ma current loop, factory set; optional
RS422 or RS485
Baud rate: 2400 or 9600, switch selectable
Protocol: Form of ANSI X3.28-1976 [Allen Bradley
compatible]
Character set: ANSI X3.4
Error check: CRC or BCC, switch selectable.
Isolation: optical for all types including RS-232.
Display: LED indicates communication active.