Siemens SIMATIC Box PC 820, Manual

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3-5
Box PC 820 / PC FI45 V2, Manual
A5E00051531-03
param7 (DK code) With SIMATIC PCs a maximum of 32 keys on the membrane
keyboard can be configured as direct keys. Up to 2 direct keys can be operated
simultaneously.
In principle, every key on the membrane keyboard of the SIMATIC PC can be
programmed as a direct key. The special keys (S1 to S16, to the left and right of
the screen) and/or the function keys (F1 to F20, at the bottom of the screen) are
used as direct keys. A direct key can also be configured as a PC key.
The function (properties) and the key (direct key number) to which the direct key
function is assigned, are represented in a byte (DK code) (within <.....>.
The DK code:
DK-code (in hex) = function code + number of direct key –1 or for the special
function.
DK-code (in hex) = special function code
In the case of special functions, no direct key number must be added to the special
function, as with special functions all the direct keys are always addressed at the
same time.
Function Function code Description
On 40 hex Pressing a key sets digital input, state remains when key is released
Off 00 hex Pressing a key resets digital input, state remains when key is released
Touch C0 hex Pressing a key sets digital input, releasing the key resets digital input
Toggle 80 hex Every time a key is pressed and then released, the state of the digital
input is inverted.
The following special functions can be configured:
Function Special Function
Code
Description
All on 20 hex Pressing a key sets all digital inputs, state remains when key is released
All off 60 hex Pressing a key resets all digital inputs, state remains when key is
released
All touch E0 hex Pressing a key sets all digital inputs, releasing the key resets all digital
inputs
All toggle A0 hex Every time a key is pressed and then released, the state of all digital
inputs is inverted.
Keyboard Controller (PC FI45 V2)
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