TE Technology TC-24-25 - Manual (Page 26)

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Bit 1 = 1 means LOW ALARM.
Bit 2 = 1 means COMPUTER CONTROLLED ALARM.
5. INPUT 2
Write Command: NA
Read Command: 06 hex
Interpret: Input 2 reading as a thermistor temperature sensor.
6. ALARM TYPE
Write Command: 28 hex
Read Command: 41 hex
Interpret: 0 sent or returned means no alarms.
1 sent or returned means Tracking Alarm Mode.
2 sent or returned means Fixed Alarm Mode.
3 sent or returned means Computer Controlled Alarm Mode (see
write command 2f hex).
7. INPUT2 DEFINE (the desired control temperature or “set temp” input definition)
Write Command: 29 hex
Read Command: 42 hex
Interpret: This function tells the controller how the set-point temperature will
be communicated.
0 sent or returned means computer communicated set value.
1 sent or returned means Potentiometer Input.
2 sent or returned means 0 to 5 V Input.
3 sent or returned means 0 to 20 mA Input.
4 sent or returned means “Differential set”: Desired Control Value
= Temp2 + Computer Set.
Range of values settable via commands 20 hex & 21 hex (HIGH
ALARM SETTING and LOW ALARM SETTING).
8. RS485 ADDRESS
Write Command: 2a hex
Read Command: 43 hex
Interpret: The address of a controller for use with multiple controllers on the
link. This must be a 2-digit hex value. 00 is the universal address
and 63h is reserved for when JP1-3 is jumpered to JP1-6 (installing
a new controller the link).
9. CONTROL TYPE
Write Command: 2b hex
Read Command: 44 hex
Interpret: 0 is deadband control.
1 is PID control.
2 is computer control. With this setting, the output power sent to the
cooler is determined by sending a write command (0x1c) to
INPUT1. The range of values then becomes -120 to +120, which
corresponds to -100% output power to +100% output power.