To activate Safe Mode on drop-out, activate the Safe Mode function via
the menu and configure the Safe Mode parameters. In addition, activate the
control station monitoring function
“Control station” on page 113. After
monitoring has been activated, the constant temperature equipment actively
checks the sending of commands from the control station after connecting
to it.
The control station must send a command to the constant temperature
equipment periodically. The user must define the time the system waits
before reporting a communication fault. If the control station fails to send
a command within the specified time, the interface (Ethernet) sends a cor-
responding command to the constant temperature equipment. In this way,
Safe Mode is activated and a warning generated.
The device triggers Alarm 22 if the Safe Mode function is switched
off
Table 39 “Constant temperature equipment alarms”
If Safe Mode has been activated, the operator can switch off Safe Mode in
the associated menu. The parameters set by the Safe Mode will be retained
after the deactivation of Safe Mode. The programmer is not continued auto-
matically. If the “Set point offset” function is required, it must be activated
manually.
The Safe Mode function cannot be used together with the EtherCAT
module. The Safe Mode function is switched off and locked when using
EtherCAT.
If an alarm has triggered Safe Mode, the alarm on the con-
stant temperature equipment must be reset first. Only then can
Safe Mode be switched off and then back on.
Switching off Safe Mode via an interface command is not possible.
1.
Press the [Enter key] to open the menu.
2.
Select the
Safe Mode
menu item and confirm the entry.
The submenu opens.
Activating Safe Mode by disconnecting
from the control station
Switching off the activated Safe Mode
Compatibility
Safe Mode menu
V4
Integral process thermostats with flow control unit
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