Allen-Bradley 1444-AOFX00-04RB, Руководство пользователя, Страница: 429 / 550

Rockwell Automation Publication 1444-UM001D-EN-P - June 2018 429
CIP Objects Appendix A
Rod-Drop Maximum Machine Speed
The maximum machine speed is calculated such that there is always at least one
sample available to base the measurement on.
The SRD (Channel Setup Object, Attribute 19) determines sample rate, the
decimation setting does not play any part.
Maximum RPM = (Sample Rate Hz * Measurement Range Degrees) / 6
Round the result down to an integer RPM.
Target Positive Direction
Allow sense control of the axial/thrust measurement for displacement
transducer type based applications. The following options apply:
• Active/Normal (target movement away from probe - ECP system
output more negative, is considered a positive DC output).
• Inactive/Counter (target movement towards probe - ECP system output
less negative, is considered a positive DC output).
Table 160 - Common Services
Service
Code Implementation Service Name Description of Service
Class Instance
0x0E x x Get Attribute Single Returns the contents of the specified attribute
Table 161 - Object Specific Services
Service
Code Implementation Service Name Description of Service
Class Instance
0x4B - x Zero Channel Option to take the current measurement value
and assign to offset attribute (considering the
current setting of this attribute value) such as to
zero the measurement channel.
• To satisfy security requirements, this service
only executes if an alarm inhibit is being
imposed via the I/O connection (output) data.
• This is an instance level service (the instance
that is specified dictates the particular channel
'zero'd').