Festo EMCA-EC-67 CO Series, Description

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10 Control via FHPP
154 Festo – EMCA-EC-C-HP-EN – 2017-11e – English
10.3 Master control and access protection
Users can block FCT access to the EMCA through the controller. The control bit “FCT access blocked”
(CCON.LOCK, B5) and the status bit “Master control FCT” (SCON.FCT/MMI, B5) in the FHPP standard
data are used for this purpose.
Prevent operation through FCT (CCON.LOCK, bit 5):
Setting the control bit “FCT access blocked” (CCON.LOCK, B5 = 1) causes the controller to prevent the
FCT from taking over master control over the EMCA.
Acknowledge FCT master control (SCON.FCT/MMI, bit 5):
The set status bit “master control FCT” (SCON.FCT/MMI, B5 = 1) reports to the controller that the FCT
has master control over the EMCA. In this status, the controller has no control over the EMCA.
10.3.1 Master control over the EMCA
Diagram: Master control over the EMCA
The diagram shows the transfer of master control between the controller and the Festo Configuration
Tool (FCT).
Master control
“FCT” active
Festo Configuration Tool (FCT)
Device control
controller
Power ON
Block FCT access
(CCON.LOCK, B5)
EMCA
FCT drive control
(SCON.FCT/MMI, B5)
Fig. 10.3 Diagram: Master control over the EMCA