Capacity limits for workstations

Description	Limit
For ProfessionalPLUS, Professional, Maintenance, Base Stations, and Operator Stations with Appropriate Licenses Installed
Total unique runtime datalinks for systems using DeltaV Operate	< 3000 per main picture (recommended) Important: Performance degradation could increase when 3000 datalinks are exceeded.
Event Chronicle History Data Set	100 MB recommended 4 GB maximum (Generally, 100 MB of disk space can hold between 250,000 and 500,000 records depending on the content of each event record.)
Maximum open DeltaV Explorer applications	1
Maximum open Control Studio applications	4⁽¹⁾
Historical data values (DeltaV Continuous Historian)	250⁽²⁾
Open faceplates per module type	4
Open detail displays	1
Open pictures	25 (recommended)
Workstation Object Identifiers⁽³⁾	32,000

⁽¹⁾ When the Print Setup dialog is open, it is counted as one of the four maximum copies.

⁽²⁾ The ability of the DeltaV Continuous Historian to record values is dependent on the number of values collected, the sampling period specified for those values and the workstation hardware. To ensure that all values are collected for the DeltaV Continuous Historian, configure the number of parameters and their sampling period such that the value of the DCLoad parameter in the Continuous Historian subsystem of DeltaV Diagnostics remains below 100%.

⁽³⁾ The workstation uses object identifiers to keep track of remote items with which it is communicating. Each connection with a remote item consumes one object identifier. Maintain the FreOID parameter value above 2,000. A FreOID parameter value below 2,000 may result in interrupted control and communication failure. If the FreOID value is low, you can increase it by decreasing the number of one or more of the following: the devices communicating with the workstation, the modules from which the workstation reads data, and the modules running in the workstation.

For the ProfessionalPLUS workstation only
Plant areas (including remote zone areas)	250
Modules per unit	255
Named sets	835 (available)
Alarm types	235 (available)
DeltaV user accounts per system	200 (recommended)
Maximum open engineering tasks on Professional Workstations	60 (includes applications open on local ProfessionalPLUS workstations)
Number of concurrent Professional Workstations connected	10

For Application Stations only
OPC data values	30,000⁽¹⁾
Maximum assigned modules	3,000
SCADA tags	25,000
Historical data values	DeltaV Continuous Historian: 30,250⁽²⁾ Advanced Continuous Historian: 60,000 Embedded enterprise historian (OSIsoft PI Server): 30,000 Integrated enterprise historian (OSIsoft PI Server): 500,000
History samples/second rates	DeltaV Continuous Historian: 3,000 Advanced Continuous Historian: 10,000 Enterprise historian (OSIsoft PI Server): 5,000
Workstation Object Identifiers ⁽³⁾	32,000

⁽¹⁾ You can determine the actual number of OPC data values you are using by referring to the OPC Subsystem of DeltaV Diagnostics.

⁽²⁾ The ability of the DeltaV Continuous Historian to record values is dependent on the number of values collected, the sampling period specified for those values and the workstation hardware. To ensure that all values are collected for the DeltaV Continuous Historian, configure the number of parameters and their sampling period such that the value of the DCLoad parameter in the Continuous Historian subsystem of DeltaV Diagnostics remains below 100%.

⁽³⁾ The workstation uses object identifiers to keep track of remote items with which it is communicating. Each connection with a remote item consumes one object identifier. Maintain the FreOID parameter value above 2,000. A FreOID parameter value below 2,000 may result in interrupted control and communication failure. If the FreOID value is low, you can increase it by decreasing the number of one or more of the following: the devices communicating with the workstation, the modules from which the workstation reads data, and the modules running in the workstation.