
Page 226
Thermo Scientific APEX User’s Guide
Using an External Device to Switch Products
This function allows an external device—such as a programmable logic controller (PLC)—
to tell the detector to change the running product to one of the first three products.
Example
You are a supervisor at a dairy. In the morning you use your APEX and a conveyor
application to analyze milk, but at noon every day, you need to start analyzing salted
butter. You have installed a PLC that changes the configuration of your conveyor every
day at noon, and need to alert the APEX when this change occurs. This is done by
having the PLC send signals to the detector’s Inputs (Inputs assigned to Product Select
One and Product Select Two). When input signal voltage changes due to the PLC, the
APEX can immediately stop analyzing milk (Product 1), and load all the product
parameters you have set for salted butter (Product 2). The detector is now ready to start
analyzing salted butter (Product 2).
1)
Make sure appropriate menu is highlighted.
2)
Press the Go button and an input screen appears.
3)
Make the appropriate assignments for input (Input 1–6) and polarity (+ or –).
4)
Press the Go button to save your settings.
5)
Press the Back button to exit the menu.
The APEX can automatically switch to any of the first three products, as shown by the
parameters in the table below.
New running
product
Product select 1
input
Product select 2
input
No change
False
False
Product 1
True
False
Product 2
False
True
Product 3
True
True
Note: A product-select input that is not assigned (input = 0), will always be treated as
false.
Содержание APEX 100
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