Sierra Wireless MP 875 - Manual (Page 49)

Configuring the MP Modem to Report GPS and I/O Data
Digital I/O setup
The Digital Input/Output window ( Tools > Options > MP >
Input/Output > Digital I/O ) is used to configure devices on the two
digital I/O and two digital input ports. Each tab corresponds to
a pin:
Digital Tab Connector Pin
I/O 1 Input or output on pin 3
I/O 2 Input or output on pin 11
Input 3 Input on pin 4
Input 4 Input on pin 12
To configure a digital sensor or gauge, select the tab that corre­
sponds to the pin you are using and complete the fields as
follows:
• Label: Provide a description of the sensor or gauge, up to
20 characters in length.
• Type: Select Input , Output , or Not used . ( Output is not
available on tabs 3 and 4.)
• Logic low name: Describe the state of the device at logic
level low, up to 20 characters in length. (For example, if a
switch in the off position leads to a logic low, you could
choose to label it
Switched Off .)
• Logic high name: Describe the state of the device at logic
level high, up to 20 characters in length (such as
Switched
On ).
• Alarm logic level: Assign an action associated with the I/O
port:
· high: A notification is sent, and the event is logged, if the
state changes from a logic low to a logic high.
· low: A notification is sent, and the event is logged, if the
state changes from a logic high to a logic low.
· log only: No notification is sent, but any change in logic
level is logged.
The name and location of the log file is specified in the
Input/Output window (
Tools > Options > MP > Input/Output ).
By default, the log file is located in the program folder or
user folder and is and called MpIoLog.txt.
• Current value: Shows the current value of the port.
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