TE Technology TC-36-25-RS485 - Manual (Page 47)

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4. ALARM STATUS
Write Command: NA
Read Command: 05
Interpret:
0 returned means no alarms.
Bit 0 = 1 means HIGH ALARM.
Bit 1 = 1 means LOW ALARM.
Bit 2 = 1 means COMPUTER CONTROLLED ALARM.
Bit 3 = 1 means OVER CURRENT DETECTED.
Bit 4 = 1 means OPEN INPUT1.
Bit 5 = 1 means OPEN INPUT2.
Bit 6 = 1 means DRIVER LOW INPUT VOLTAGE.
Example:
Suppose there are two alarm conditions: HIGH ALARM and OVER CURRENT DETECTED.
Send: *6205000000004d^
Receive: *0000000989^
Convert 00000009
16
to binary: 0001001
2
(bit 3 and bit 0 are set)
5. INPUT 2
Write Command: NA
Read Command: 06 hex
Interpret:
When a secondary thermistor temperature sensor is used, the temperature it is
sensing can be read. Convert the hexadecimal “return value” to decimal and divide by
100
10
to interpret as °F/°C.
6. OUTPUT CURRENT COUNTS
Write Command: NA
Read Command: 07
Interpret: Output current detection in A/D counts.
7. ALARM TYPE
Write Command: 28
Read Command: 41
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
ALARM LATCH ENABLE).
8. SET TYPE DEFINE (the desired control temperature or “set temp” input definition)
Write Command: 29
Read Command: 42
Interpret:
This function tells the controller how the set‐point 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.
5 sent or returned means set value is from optional MP‐2986 Display and Keypad
accessory.
The range of values is settable via the commands HIGH EXTERNAL SET RANGE and
LOW EXTERNAL SET RANGE.