Technical data

R911305038 / 01 | Rexroth VCP-Operating Concept Electric Drives and Controls | Bosch Rexroth AG 5-127
Standard Mode
value. The value is interpreted by the operating terminal and its func-
tion is executed.
Values can be:
• Message numbers
• Mask numbers (mask number + 8000H)
• Control Codes
5.15.4 Image of the Status LEDs
The LED image enables the controller to control the status LEDs of the
function keys of the connected operating device. The functions ON,
OFF, or FLASHING can be set for each status LED. As soon as the
controller sets a bit, the assigned LED on the operating device is influ-
enced accordingly.
In this context, it is important that the length of the polling area and the
polling time were also set correctly. If these additional parameters were
not set correctly, problems may occur during the LED control.
For a function key that leads directly to the message mask, the status
LED is influenced by the message system. In this way, the message
system indicates that a new message has been received and has not
yet been acknowledged. To influence the status LED of this function
key from the controller, you must set the message priority to 0 (zero).
5.15.5 Polling Time
The polling time specifies the intervals the operating device will use to
read the variable for the cyclical polling area. You set the polling time in
the system parameters for the polling area. The polling of this variable
also covers the Write Coordination byte, the serial message channel,
and the image of the status LEDs.
Settings in or around a half a second have proven useful in most proto-
cols. If the cycle time set is too low, the interface protocol can no longer
follow requests, and reaction performance deteriorates.
There is no universal recipe, however.
Bit 1 Bit 2 Status of the LED
00OFF
0 1 OFF, FLASHING is preset
10ON
1 1 FLASHING
Fig. 5-49: Truth table for a status LED