8
Bit=0 means no password setting. Bit=1 means password is set (b0~b2). b3~b6 are used for
displaying current password status.
9 SYNCHRONOUS COMMUNICATION PROTOCOL & AUTO NUMBER ID FUNCTION
By using Auto Number ID function, the communication protocol of DTC2000 can be set the same as
the one of DTC1000. ID numbers tend to increase.
1. Set the auto communication flag to be “1” for DTC1000 (communication address 1022H).
2. Switch off the controller before connecting to another DTC2000. After that, switch on the power
again.
3. Communication default: 9600bps, 7bits, Even, 1 stop bit.
4. This function will result in additional 3~5 seconds for power on.
10 RS-485 COMMUNICATION
1. Supporting transmission speed: 2400, 4800, 9600, 19200, 38400bps.
2. Non-supported formats: 7, N, 1 or 8, E, 2 or 8, O, 2.
3. Communication protocol: Modbus (ASCII or RTU)
4. Function code: 03H to read the content of register (max. 8 words). 06H to write one word into
register. 01H to read bits data (max. 16 bits). 05H to write one bit to register.
5. Address and Content of Data Register:
Address Setting Content Explanation
Temperature unit: 0.1 degree. Analog input: 1EU.
Following read values happen to errors:
8002H : Initial process (Temperature value is not got yet)
8003H : Temperature sensor is not connected
8004H : Temperature sensor input error
8006H : Cannot get temperature value, ADC input error
1000H Process value (PV)
8007H : Memory read/write error
1001H 0 Set point (SV) Unit: 0.1 degree. Analog input: 1EU.
1002H 6000
Upper-limit of
temperature range
Upper-limit ban, unit: 0.1 degree.
1003H -200
Lower-limit of
temperature range
Lower-limit ban, unit: 0.1 degree.
1004H 12
Input temperature
sensor type
Please refer to the contents of the “Temperature
Sensor Type and Temperature Range” for detail
1005H 0
Control method 0: PID, 1:ON/OFF, 2: manual tuning, 3:PID program
control
1007H 4
1st group of
Heating/Cooling
control cycle
0~99, 0:0.5 sec
1008H 4
2nd group of
Heating/Cooling
control cycle
0~99, 0:0.5 sec (it will be invalid when both groups are
control output at the same time)
1009H 476
PB Proportional
band
1 ~ 9999, unit: 0.1 degree, analog input: 1EU
100AH 260 Ti Integral time 0~9999
100BH 41 Td Derivative time 0~9999
100CH 0 Integration default 0~1000, unit: 0.1%
100DH 0
Proportional control
offset error value,
when Ti = 0
0~1000, unit: 0.1%
100EH 100 COEF settin
when 1 ~ 9999, unit: 0.01
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