CAM216/16 IOM
Doc. Number: ECM-402-0116
January 2016, Rev. 1
61
Section 9: Device Descriptor (DD)
Device Descriptor (DD)
9.8
Methods
Methods, as used in HART terms, are a predetermined sequence of steps. These steps usually
use a structured programming language and an interface definition. Methods can be used for
a variety of functions including changing the mode and configuring the actuator . The hosting
system and configuration software determines how these methods are handled and appear to
the user.
Emerson Process Management electric actuators using HART CAM16/216 provide the
following methods:
•
Locate Device Method:
It is used to identify the device in the field by showing pattern (0-0-0) on the device display.
This method is applicable to MPA, TEC2000, TEC2, Model 500, and EHO.
•
Change Mode Method:
It allows the User to change the mode from Auto to Manual and vice-versa.
•
Detailed Setup Method:
It is used to configure the parameters of particular actuator.
•
Target Travel Method:
It can be used to configure Custom Characterization data points.
•
Configuration Commands Method:
It is used to configure the Configuration Commands parameter. Configuration Commands
parameter is reserved for internal use only.
•
Actuator Command Method:
It can be used to control the actuator. The device will accept an Open, Close or Stop command
and react accordingly. In case of MPA this method is called as Go to Next Port. This method is
used to change the port of MPA actuator.
•
Configure Polling Address Method:
It allows the User to change the polling address of the device.
•
Configure Advanced Broadcasting Method:
It is used to configure three Burst Messages. This method will work only with those hosts who
support advanced broadcasting.
•
Write Protection Method:
It allows the user to prevent changes to the device’s configuration.
•
Lock/Unlock Method:
It allows a Master to give exclusive access of Device. It gives basically three options to lock the
Device, Temporarily, Permanent, and Lock All to prevent the configurations that can be changed
by another master.
•
Configure Setpoint Method:
It allows the User to change the Setpoint of the device. This method is applicable only for MPA.
•
Device Reset Method:
It is used to reset the CAM card.
