Model Type: 10000823 MPS III Power Supply Chasis
800xA for Symphony Plus Harmony communicates with the control systems through a Cnet-to-computer interface (IET800. PNI800).
800xA for Symphony Plus Harmony is a distributed process management and control system.
Using a series of integrated Harmony control units, the system allows monitoring and control of process variables such as flow rate,
temperature, and pressure according to a control configuration that the engineer or technician defines.
A Harmony control unit is a controller and its I/O devices connected for communication on control network (Cnet).
800xA for Symphony Plus Harmony operates in a Windows environment on personal computer hardware.
Using interactive process graphics, the operator can monitor and control all Analog loops and Digital devices interfaced to the network through Harmony control units.
800xA for Symphony Plus Harmony provides maintenance personnel with the capability to globally monitor
the operating status of any system component on the network, and to diagnose component failures from any workstation.
800xA for Symphony Plus Harmony also provides the Harmony Executive Service.
It is an 800xA service that controls underlying 800xA for Symphony Plus Harmony services.
These accuracy settings are only used when negotiating for time mastership with
other nodes in the underlying Harmony control network.
Master Update Period
Master update period is the frequency that Harmony Server synchronizes time with
the underlying Harmony control network. This property is used only when Time
Synchronization is enabled. The permissible values are 120 to 3540 seconds.
Accuracy
Time synchronization accuracy of the Server is valid when the Server is in time
synchronization mode. The options are:
• Low accuracy (lowest accuracy); priority 0.
• Low accuracy battery backed; priority 3.
• High accuracy battery backed; priority 6.
• IIOIS20 node; priority 9.
• IIOIS20 SCSI; priority 10.
• PIMS SCSI; priority 11.
• Satellite clock system (highest accuracy); priority 12.
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