
Controller functions
Page 50
RES-408
Version 1
11.17 Communication error between the controller and the terminal (as of June 2006)
If a data communication error occurs between the T-408 terminal and the RES-408 controller or if communication
is interrupted, the display on the terminal changes to indicate this (rotating segments).
A communication error can have the following causes:
• The controller and terminal are not compatible. The permissible device combinations are described in section 7
"Controller/terminal compatibility" on page 13.
• The connecting cable between the controller and the terminal is defective.
• The controller and/or terminal hardware is defective.
Operation of the RES-408 is not interrupted in the event of an error in communication. No error mes-
sage appears and the fault relay is not active. In order to avoid malfunctions, the controller must be
immediately switched off.
11.18 Undervoltage detection (as of June 2006)
Trouble-free operation of the temperature controller is guaranteed within the line voltage tolerance range specified
in section 6 "Technical data" on page 12.
If a line voltage which is less than the lower limit of the permissible range occurs, the controller is switched to a
standby mode. No more heatsealing processes take place and no more measuring impulses are generated. The
display changes to indicate this..
The main menu is displayed again, and operation is resumed, when the input voltage returns to the specified tol-
erance range.
The standby mode is indicated by 0°C (corresponds to 0V) at the analog output. The alarm relay is de-energized.
Trouble-free operation of the controller is only guaranteed within the specified input voltage toler-
ance range. An external voltage monitor must be connected to prevent defective heatseals as a
result of low line voltage.
HOLD
PREHEAT
SEALHEAT
ENTER
HAND
RESET
ROPEX
T-408
!
HOLD
PREHEAT
SEALHEAT
ENTER
HAND
RESET
ROPEX
T-408
!