Siemens SINUMERIK 840D sl Equipment Manual page 92

Operator control and display elements
5.2 Description
Information for calibrating the touch screen of the HT 8 can be found in:
"General information and networking", Chapter: "Networking"
Note
Calibration of the touch sensor may also become necessary during operation, because the
resistance values of the touch membrane change when there is a temperature change.
Membrane keyboard
On the front of the HT8, 52 keys are arranged in several key blocks (see View (Page 89)).
NOTICE
Damage to the keys when using pointed or hard objects
Only use your fingers to touch the membrane keyboard and not sharp or hard objects, which
can damage or even destroy the keys. Further, please note that the touch pen is also not
suitable for using the membrane keyboard.
Function keys machine control panel
• Left: START, STOP, RESET, AUTO, JOG, TEACH, ALARM CANCEL
• Bottom: U (User button)
• Right: 2 x 6 traversing keys, 4 user keys (can be freely assigned)
HMI control keys
• The number pad contains the numbers 1-9, the decimal point and the minus sign
• The cursor pad is used to navigate on the screen.
• Seven keys for
– Input
– Menu change
– Switch-over of the softkey bars
– Help function
Emergency Stop button
The red mushroom-shaped head of the Emergency Stop button is provided with a yellow ring.
Directly under the mushroom-shaped head, there is also a black ring which identifies the
position status of the Emergency Stop button.
92
Ring (black)
Emergency Stop button
State
Visible
Not pressed
Equipment Manual, 02/2024, A5E52918633B AA
Not visible
Pressed
Handheld Terminal HT 8