Pools
A GPI/GPO pool is a place where contacts are collected to form an output trigger.
Take
The GPI contacts not only can be used as GPI contact but also can be assigned as Take contact. The
menu item is called GPI_n-Take. Where n is the amount of GPI pools in the product. Every pool can only
have one Take contact. There will be no restrictions in assigning the contact to a GPI pool and Take
function at the same time. The values will be 1 to x. When assigning a take pin to a pool set to Prio_
Latched mode, the pool will behave the same as when set to Prio mode with a take pin assigned. This is
because the take pin overrules the latched functionality of the Prio_Latched mode.
Pool Mode: GPI
Every GPI pool can be set up to process the input contacts in three ways. This setting is called GPI_n-
Mode and can be set into priority (Prio), priority latched (Prio_Latched) and Binary mode. N is defined as
a character in the range from A-Z depending on the number of pools. The default output value of a pool
is always 0. This translates to preset 1 in EVS products.
In priority mode, the contact which has the highest priority defines the pool value. Priority is defined as
ranging from the least significant bit (low priority) to the most significant bit (high priority). This is
essentially a one-hot coding of preset values.
If a pool has three contacts connected and all inputs are high, the output value of the pool will be 3.
Another example is when three contacts are connected to a pool with the first and third contact are low
and the second contact is high the output value is 1.
Input 1
Input 2
Input 3
Pool Value
Preset no.
0
0
0
1
1
1
0
0
1
1
X
1
0
2
2
X
X
1
3
3
Table 1. Pool value in prio and prio_latched mode
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| November 2021 | Issue 1.00.D
