BECKHOFF CP9030 - Manual (Page 20)

Technical Data CP9030
Control
BLOFF
: "1" switches the background illumination off
Keyb_on : "1" disables the Control Panel's membrane keypad
J300 (CP9030_3) J501 and J502 must be set
Ident String
Returns the current firmware status of the CP-Link card
Ready
COM_F
: "1" - A communication error has occurred
Request
If the CP-Link card is being operated in synchronous mode (as, for
example, with TwinCAT), then the data should not be fetched from the PLC
until both the values (Active and Toggle) are "1". Only then is a correct
value for the buttons guaranteed.
CP9030 / CP9035 21