Instruction manual

6. MODBUS COMMUNICATION PROTOCOL
IMR01H02-E3
53
6.7 Data Configuration
6.7.1 Data range
The numeric range of data used in Modbus protocol is 0000H to FFFFH. Only the set value within the
setting range is effective.
FFFFH represents -1.
Data processing with decimal points
!"
!"!"
!"
Data with decimal points
#"
#"#"
#"
Data with one decimal place
The Modbus protocol does not recognize data with decimal points during communication.
Current transformer 1 input value Cool-side manipulated output value *
Current transformer 2 input value * Control loop break alarm (LBA)
Manipulated output value or Heater break alarm 1 (HBA1)
heat-side manipulated output value Heater break alarm 2 (HBA2) *
* This item does not use in the MA901.
Example: When the control loop break alarm set value is 8.0 minutes; 8.0 is processed as 80,
80 = 0050H
Control loop break High 00H
alarm Low 50H
!"
!"!"
!"
Data without decimal points
Burnout Used/unused of channels
Alarm 1 status RUN/STOP transfer
Alarm 2 status PID/AT selection
Alarm 3 status Digital filter
Output status Proportioning cycle time or
DI status heat-side proportioning cycle time
Memory area number selection Cool-side proportional cycle time *
Cool-side proportional band * Scan interval time
Integral time EEPROM storage mode
Derivative time EEPROM storage status
Anti-reset windup Lock level 1
Setting change rate limiter Lock level 2
* This item does not use in the MA901.
Example: When integral time is 50 seconds; 50 is processed as 50, 50 = 0032H
Integral time High 00H
Low 32H