
Controller functions
Version 1
RES-409
Page 35
The "Value" parameter in the START command (address 5) has the following structure:
The START command is only accepted if there are no faults and the "AUTOCAL" function is not running
(
section 10.4.1 "Controller status" on page 39). The number of the required set point and the maximum heatup
time (50ms…2550ms) are transferred together with the START command. If the controller must heat for longer
than 2550ms (e.g. for continuous heating), a new START command must be sent before the end of the heatup
time. This mechanism ensures that the controller does not heat in an uncontrolled way for long periods if there is
no CAN communication. The heating phase can be prematurely terminated by sending a START command with
a heatup time < 5 (corresponds to < 50ms), whereby the set point number is irrelevant. The controller then stops
the heating phase immediately and changes to measuring mode.
Each START/STOP command is answered with an acknowledgment message (address 9), which also contains
the 6 low bits of the controller status in addition to the actual temperature value.
By means of a 24VDC control signal (controllers manufactured as of February 2007):
A START/STOP command for set points 0 and 1 can also be activated by means of a digital 24VDC control signal
(START 0 or START 1). When a "START" signal is activated, the controller-internal set/actual comparison is
enabled and the heatsealing band is heated to the SET temperature. It remains at this temperature until the signal
is deactivated again.
The "HEAT" LED on the front panel of the RES-409 is lit continuously for the duration of the heating phase.
The "START" signal (START 0) for set point 0 is activated by applying a 24VDC signal at terminals 5+6.
Bit no.
Name
Meaning
Bits 0…7
Heatup time
Time in 10ms steps until the control process is automatically deactivated
(at least 50ms).
Bits 8…9
Set point
Number of the required set point (0…3)
Bits 10…15
Not assigned
RES-409
max. 6mA
5
6
START 0
(set point 0)
+
-
GND
24VDC
START 0
(set point 0)
HIGH:
≥
12VDC
LOW:
≤
2VDC