Reference MVI56-CAS
♦
ControlLogix Platform
Teledyne CA Slave Module
ProSoft Technology, Inc.
Page 71 of 86
December 26, 2007
Function Function
Name
Description
3
Read Meter Data
The module supports access to a total of up to 250 words of
Meter data (125 meter readings) from the ladder processor. In
TCAP vernacular, the "Starting Meter Number" determines the
first word to be accessed, while the "Number of meters to be
returned" value determines the number of words to be
returned to the master.
10
Read Frozen Analog
Data
This function provides the master access to the contents of up
to a 250 word buffer maintained in the module. This buffer
contains the analog values stored as a result of the last
"Freeze Analogs" command (44/45) received from the Master.
It is addressed in the same fashion as Function 2.
11
Read Frozen Meter
Data
This function provides the Master access to the contents of up
to a 250 word buffer maintained in the module. This buffer
contains the meter values stored as a result of the last "Freeze
Meters" command (43/45) received from the Master. It is
addressed in the same fashion as Function 3.
16
Read All Data
This general-purpose command is supported in the ProSoft
module. The following Data Select Types are available from
the module:
Status Inputs (Data Select 1, bit 7)
Analog Inputs (Data Select 1, bit 6)
Meter Accumulator Inputs (Data Select 1, bit 5)
Current Tank Data (Data Select 1, bit 2)
Maximum Analogs Register (Data Select 1, bit 1)
Local Freeze Analog Data (Data Select 1, bit 0)
Local Freeze Meter Data (Data Select 2, bit 7)
Local Freeze Tank Data (Data Select 2, bit 6)
Hourly Freeze Analog Data (Data Select 2, bit 5)
Hourly Freeze Meter Data (Data Select 2, bit 4)
Hourly Freeze Tank Data (Data Select 2, bit 3)
Periodic Analog Data (Data Select 2, bit 2)
Periodic Meter Data (Data Select 2, bit 1)
Periodic Tank Data (Data Select 2, bit 0)
The command allows up to 63 analog values to be requested
and up to 7 meters. If no data quantity is requested (length
fields are zero), all of the available data, as defined in the
Configuration Parameters, will be returned. When the Status
Inputs are requested, the full status table is returned.
5.8.2 Control Commands From Master
When Control commands are received from a Master, their action is immediately
communicated to the PLC/SLC for action. No modification is made directly to the
ProSoft Module's memory as a result of a Control command. In order for and
Control action to be reflected in the module's memory, it must be transferred
within the Status Data block.
