Delta A Series User Manual download pdf (Page 9)

13 RS-485 Communication

1. Supporting transmission speed: 2400, 4800, 9600, 19200, 38400bps

2. Non-supported formats: 7, N, 1 or 8, O, 2 or 8, E, 2

3. Communication protocol: Modbus (ASCII or RTU)

4. Function code: 03H to read the contents of register (Max. 8 words). 06H to write 1 (one) word into register. 02H to read the bits data (Max.

16 bits). 05H to write 1 (one) bit into register.

5. Address and Content of Data Register:

Address Content Explanation

Measuring unit is 0.1, updated one time in 0.4 second

The following reading value display indicates error occurs:

8002H : Initial process (Temperature value is not got yet)

8003H : Temperature sensor is not connected

1000H Process value (PV)

8004H : Temperature sensor input error

8006H : Cannot get temperature value, ADC input error

8007H : Memory read/write error

1001H Set point (SV) Unit is 0.1,

C or

1002H Upper-limit of temperature range The data content should not be higher than the temperature range

1003H Lower-limit of temperature range The data content should not be lower than the temperature range

1004H Input temperature sensor type Please refer to the contents of the “Temperature Sensor Type and Temperature Range” for detail

1005H Control method 0: PID, 1: ON/OFF, 2: manual tuning, 3: PID grogram control

1006H Heating/Cooling control selection 0: Heating, 1: Cooling, 2: Heating/Cooling, 3: Cooling/Heating

1007H 1st group of Heating/Cooling control

cycle

0~99, 0:0.5 sec

1008H 2nd group of Heating/Cooling control

cycle

0~99, 0:0.5 sec

1009H PB Proportional band 0.1 ~ 999.9

100AH Ti Integral time 0~9999

100BH Td Derivative time 0~9999

100CH Integration default 0~100%, unit is 0.1%

100DH Proportional control offset error value,

when Ti = 0

0~100%, unit is 0.1%

100EH The setting of COEF when Dual Loop

output control are used

0.01 ~ 99.99

100FH The setting of Dead band when Dual

Loop output control are used

-999 ~ 9999

1010H Hysteresis setting value of the 1st

output group

0 ~ 9999

1011H Hysteresis setting value of the 2nd

output group

0 ~ 9999

1012H Output value read and write of Output

Unit is 0.1%, write operation is valid under manual tuning mode only.

1013H Output value read and write of Output

Unit is 0.1%, write operation is valid under manual tuning mode only.

1014H Upper-limit regulation of analog linear

output

1 Unit = 2.8uA(Current Output) = 1.3mV(Linear Voltage Output)

1015H Lower-limit regulation of analog linear

output

1 Unit = 2.8uA(Current Output) = 1.3mV(Linear Voltage Output)

1016H Temperature regulation value -999~+999, unit: 0.1

1017H Analog decimal setting 0 ~ 3

1018H Time for valve from full open to full

0.1~999.9

1019H Dead Band setting of valve 0~100%; unit: 0.1%

101AH Upper-limit of feedback signal set by

valve

0~1024

101BH Lower-limit of feedback signal set by

valve

0~1024

101CH PID parameter selection 0~4

101DH SV value corresponded to PID value Only valid within available range, unit: 0.1 scale

1020H Alarm 1 type Please refer to the contents of the “Alarm Outputs” for detail

1021H Alarm 2 type Please refer to the contents of the “Alarm Outputs” for detail

1022H Alarm 3 type Please refer to the contents of the “Alarm Outputs” for detail

1023H System alarm setting 0 : None (default), 1~3 : Set Alarm 1 to Alarm 3

1024H Upper-limit alarm 1 Please refer to the contents of the “Alarm Outputs” for detail

1025H Lower-limit alarm 1 Please refer to the contents of the “Alarm Outputs” for detail

1026H Upper-limit alarm 2 Please refer to the contents of the “Alarm Outputs” for detail

1027H Lower-limit alarm 2 Please refer to the contents of the “Alarm Outputs” for detail

1028H Upper-limit alarm 3 Please refer to the contents of the “Alarm Outputs” for detail

1029H Lower-limit alarm 3 Please refer to the contents of the “Alarm Outputs” for detail

102AH Read LED status b0 : Alm3, b1: Alm2, b2: F, b3:

C, b4: Alm1, b5: OUT2, b6: OUT1, b7: AT

102BH Read pushbutton status b0 : Set, b1 : Select, b2 : Up, b3 : Down. 0 is to push

102CH Setting lock status 0 : Normal, 1 : All setting lock, 11 : Lock others than SV value

102DH CT read value Unit: 0.1A

102FH Software version V1.00 indicates 0x100

1 2 3 4 5 6 7 8 9 10 11 12 13

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Delta A Series User Manual Page 9

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