Extron Electronics MS9500 HD FrEND Plus - Manual (Page 84)

MS9500GL HD FrEND Plus User Guide Chapter 13: Using the GPIO Interface
The MS9500GL will send out an inputstate (See description of GET INPUT) message whenever the state of an
input changes. The input state message will contain the current state of all inputs. It is up to the control system to
determine which input(s) changed and act accordingly.
A function is provided to read the input state at any time.
GET INPUT
This function will return the state of the digital inputs on the unit.
syntax: getinput<0x0d>
return data: inputstate 1[+|-] 2[+|-] 3[+|-] 4[+|-]<0x0d>
parameters: 1,2,3,4 represent the input number
+: input is currently active
-: input is currently inactive
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