ProSoft Technology ProLinx S3964R User Manual Page 102

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102 Publication LOGIX-AP010B-EN-P - May 2010
Chapter 5 Conversion of System Functions
The following objects can be accessed by the GSV/SSV instruction.
Read/Write System Time
In the S5 PLC series the system clock can be read by using FB129
(name: SST:UHR) in conjunction with Data Block 5. A function identified of
1/0 is placed in DW0 and it determines whether the date/time is set/read.
To achieve this functionality with RSLogix 5000 the GSV (Read)/SSV (Write)
instruction is used to access the Coordinated System Time (CST) object or the
WallClockTime object.
RSLogix 5000 software allows for time intervals of microseconds to be
read/set while S5 the smallest time interval is a second. The WallClockTime
Object allows the user to specify the time zone and whether to apply daylight
savings time. An GSV instruction on the WallClockTime object can then be
used to read the Coordinated Universal Time (UTC) or the local time.
Objects Description
Axis Provides status information about a servo module axis.
Controller Provides status information about a controller’s execution.
Controller Device Identifies the physical hardware of the controller.
Coordinate System The coordinate system tag is used to set the attribute
values to be used by the Multi-Axis Coordinated Motion
instructions in your motion applications.
CST
(CoordinatedSystemTime)
Provides coordinated system time for the devices in one
chassis.
DF1 Provides an interface to the DF1 communication driver that
you can configure for the serial port.
FaultLog Provides fault information about the controller.
Message Provides an interface to set up and trigger peer-to-peer
communication.
Module Provides status information about a module.
Motion Group Provides status information about a group of axes for the
servo module.
Program Provides status information about a program.
Redundancy Provides status information about the redundancy system.
Routine Provides status information about a routine.
Serial Port Provides an interface to the serial communication port.
Task Provides status information about a task.
WallClockTime Provides access to the current time information of the
controller’s wall clock timer.
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