ME30 infobox connect
infobox connect
13
The scope in which the programmed configuration and parameter data affect the message
inputs varies as follows:
a) Message channel:
Configuration and parameters apply to the selected message input only
b) Message group:
Configuration and parameters apply to all 8 message inputs of an input
module.
c) All message
Configuration and parameters apply to all message inputs of the
channels:
infobox device.
• Input Processing
The signal states of the message inputs are read cyclically (minimum signal duration: 5 ms). A
valid input signal is recorded in the event memory. The record contains the signal status and
date and time stamps (resolution: 1 ms).
a) Working Current (N/O) Signal
The message is generated as soon as the normally open contact closes (signalling voltage is
present).
b) Closed Circuit (N/C) Signal:
This is the opposite of the working current principle. In this case, a message is generated when
a normally closed contact opens (there is no signalling voltage).
Function:
Polarity of the message inputs
Range of application:
Message channel
Default value:
N/O signal
Parameter range:
-
For each individual message input you can disable message processing by means of an
activation function. Although message processing is inhibited, the signal states of disabled
inputs are still read and recorded in the event memory.
Function:
Activation of message inputs
Range of application:
Message channel
Default value:
Active
Parameter range:
-
Signal filtering by means of software settings is available for reducing the effects of contact
chatter. A signal change at the input is only considered as valid if it is still present after the
selected debouncing delay has elapsed. A second signal change that may occur during the
delay period is not recognized as such.
Function:
Debouncing delay for message inputs
Range of application:
Message group
Default value:
0 ms (no debouncing delay)
Parameter range:
1 to 250 times 5 ms (5 ms to 1250 ms)
The chatter stop function monitors the number of signal changes at a message input. It
prevents the event memory from being filled with invalid information, for instance when an input
contact is defect. The number of signal changes within a selectable monitoring delay is
counted. When the set limit of signal changes is exceeded , the message input is automatically
disabled. It will be enabled again, when the number of signal changes is within the set limits.
The message input is automatically enabled again, when the number of signal changes is
within the set limits.
Function:
Chatter monitoring of the message inputs
Range of application: Message group
Default value:
Monitoring period 0 ms (not activated)
Number of signal changes: 10
Parameter range:
Monitoring period: 1 to 36000 xl 100 ms (100 ms to 60 min)
Number of signal changes: 1 to 250
