Grass Valley NV9000-SE v.3.0 - Manual (Page 358)

338 Rev 3.0 • 25 Mar 10
11. Control Panels
Defining General Purpose I/O (GPIO) Connections
screen: AND, OR, and NOT. Operator precedence is normally NOT before AND before OR. Bool-
ean expressions can be parenthesized to control the order of evaluation. All parenthesized expres-
sions are evaluated first; nested parentheses are evaluated before outer parentheses.
The following is a quick summary of the Boolean operators:
• All operands evaluate either TRUE or FALSE
• AND = true if ALL terms are true; false if ANY term is false
• OR = false if ALL terms are false; true if ANY term is true
• NOT = true if term is false; false if term is true (i.e., negation)
Example:
In this example, the destination device is MON2 and the destination level SD and the source
device is CAM1 and the source level is SD.
Selecting these devices and levels, and choosing the operator ADD, produces the following
Boolean expression:
SD on CAM1 is switched to SD on MON2
That expression can then be ANDed with another expression
INPUT 3 OR INPUT 8
When selected, the relay chosen (relay 1) will transition when the entire expression is true. That
is, when the switch occurs and either of the inputs (3 or 8) transitions from ‘off’ to ‘on’.
To allow a relay to switch when an input transitions from ‘on’ to ‘off’, precede the input term
with the operator NOT. For example, the expression
INPUT 3 OR NOT INPUT 8
will evaluate true either when input 3 goes from “off” to “on” or when input 8 goes from “on”
to “off”.
One or more expressions regarding the output port status can also be included in the expression.
For example, choosing ‘Used as broadcast slave’, VTR3, and HD for output port status pro-
duces the proposition
HD on VTR3 has status of ‘Used as broadcast slave
GPIO Section of Control Panel Pages
The ‘NV9605’, ‘NV9606’, ‘NV9607’, ‘NV9609’, ‘NV9640’ and ‘NV9641’ pages feature a
‘GPIO’ section. Using this section, 4 relay outputs and 8 optically isolated inputs can be config-
ured.
How to Define GPIO Connections
1 Locate the NV9605, NV9606, NV9607, NV9609, NV9640 or NV9641 control panel being
updated. (See How to Locate and View Existing Control Panels on page 347.)
The ‘NV9605’, ‘NV9606’, ‘NV9607’, ‘NV9609’, ‘NV9640’ or ‘NV9641’ page appears, dis-
playing a ‘GPIO’ section:
Figure 11-41. GPIO Section