Controller functions
Page 40
RES-409
Version 1
10.4.2 Acknowledgment message
The RES-409 automatically sends an acknowledgment message (address 9) after every START/STOP
command. This message contains the current actual value and the most important status information:
13
Start input
0: External start input "START with set 0" is started
1: External start input "START with set 1" is started
14
Undervoltage
0: Line voltage is inside operating range
1: Line voltage is too low (undervoltage)
15
Temperature
reached
This status bit is set if the actual temperature exceeds 95% of the set
temperature. As soon as the control mode is exited or an alarm is signaled ,
this status bit is reset again.
Bit no.
Name
Meaning
0…8
Actual value
Current actual value (in °C)
9
Sign
Sign of the actual value. 0: positive, 1: negative
10…11
Set point no.
Number of the last set point used (0…3)
12
Controller active
0: Measuring mode
1: Control mode
13
"Temperature
OK" bit
0: Actual value outside specified temperature tolerance band
1: Actual value inside specified temperature tolerance band
14
Fault
0: No fault
1: Fault active
15
AUTOCAL
locked
0: "AUTOCAL" function allowed
1: "AUTOCAL" function not allowed (cooling phase)
Bit no.
Name
Meaning