Endress+Hauser iTEMP TMT82 - Page 26

Operating options iTEMP TMT82
26 Endress+Hauser
Two LEDs on the front indicate the device status in accordance with NAMUR NE44.
Type Function and characteristic
Status LED (red) When the device is operating without errors, the device status is
displayed. This function can no longer be guaranteed in the event of an
error.
• LED off: without diagnostic message
• LED is lit: diagnostics display, category F
• LED flashing: diagnostics display of categories C, S or M
Power LED (green) 'ON' When the device is operating without errors, the operating status is
displayed. This function can no longer be guaranteed in the event of an
error.
• LED off: Power failure or insufficient supply voltage
• LED is lit: Supply voltage is OK (either via CDI or via supply voltage,
terminals 1+, 2-)
6.3.2 Local operation
You can make hardware settings for the fieldbus interface using miniature switches (DIP
switches) on the rear of the optional display.
The user has the option of ordering the display with the head transmitter, or as an
accessory for subsequent mounting. →  34
NOTICE
‣
ESD - electrostatic discharge. Protect the terminals from electrostatic discharge.
Failure to observe this may result in destruction or malfunction of parts of the
electronics.
ON
OFF
1
2
4
8
16
32
64
HW
SW
ADDR ACTIVE
SIM
WRITE LOCK
DISPL. 180°
1
2
3
A0014562
 15 Hardware settings via DIP switches
1: Connection to head transmitter
2: DIP switch (1 - 64, SW/HW, ADDR and SIM = simulation
mode) no function for this head transmitter
3: DIP switch (WRITE LOCK = write protection; DISPL. 180° =
switch, turn the display monitor 180°)
Procedure for setting the DIP switch:
1. Open the cover of the terminal head or field housing.
2. Remove the attached display from the head transmitter.
3. Configure the DIP switch on the rear of the display accordingly. In general: switch to
ON = function enabled, switch to OFF = function disabled.
4. Fit the display onto the head transmitter in the correct position. The head transmitter
accepts the settings within one second.
5. Secure the cover back onto the terminal head or field housing.
Switching write protection on/off
Write protection is switched on and off via a DIP switch on the rear of the optional
attachable display. When write protection is active, parameters cannot be modified. A key
symbol on the display indicates that the write protection is on. Write protection prevents
any write access to the parameters. The write protection remains active even when the