Freeze Data Commands - ProSoft Technology inRAx MVI56-CAS User Manual

MVI56-CAS ♦ ControlLogix Platform
Teledyne CA Slave Module
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5.8.3 Freeze Data Commands

These general purpose commands initiate the movement of data within buffers in
the ProSoft Technology module. These buffers are maintained for access by
related read commands, discussed previously.
The module one-shots the freeze commands from the Master, enable the
movement of the buffers only if the Master has previously issued a read to the
previously frozen buffer.
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Page 72 of 86
Function Name
Momentary Control
Select/Operate
Continuous Control
Select/Operate
Setpoint Select/Operate
Function Name
Freeze Meters
Freeze Analogs
Freeze Meters and
Analogs
Special Freeze
Description
These control commands are recognized by the
module. If the Operate command is received out of
sequence (must be received in next communication
sequence after Select command), the command is
disregarded. If the module is configured for Direct
Control, then the Master need only send the Operate
command for action to occur. In TCAP vernacular, the
"Card Number" and the "Point Number" are combined
to identify the bit number. The action value is always
set to 1, so the action will always be to set a bit true
momentarily.
These control commands are recognized by the
module. If the Operate command is received out of
sequence (must be received in next communication
sequence after Select command), the command is
disregarded. If the module is configured for Direct
control, then the master need only send the Operate
command for action to occur. In TCAP vernacular, the
"Card Number" and the "Point Number" are combined
to identify the bit number.
These control commands are recognized by the
module. If the Operate command is received out of
sequence (must be received in next communication
sequence after Select command), the command is
disregarded. If the module is configured for Direct
Control, then the Master need only send the Operate
command for action to occur. In TCAP vernacular, the
"Card Number" (upper 7 bits) is combined with the
"Point Number" (low 1 bit) to obtain an effective
addressing range of 256 registers. The value written
to the ladder logic is limited to a 12 bit value by the
protocol specification.
Description
Moves the Meter Data buffer to the Freeze Meter
buffer.
Moves the Analog Data buffer to the Freeze Analog
buffer.
Moves the Meter Data buffer and the Analog Data
buffer to their respective Freeze buffers.
Moves current data to hourly, local, and periodic
registers.
Reference
ProSoft Technology, Inc.
December 26, 2007