SMAR MB-700, Руководство пользователя

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MB-700 – User’s Manual
4.16
Block CCDL – Concentrate Data Logger
Overview
This block supplies a mechanism to search data stored in Modbus slave devices in an optimized
way. A Modbus variable specified in the configuration will be used to indicate whether it is necessary
to scan stored data whose Modbus address are entered by user.
Description
It is an optimized mechanism to bring data stored from the LC700.
•
To start the FIFO Data Logger block of the LC700 when the communication with a MB-700
master (for example a HMI) fails, the CCDL block sends a Modbus command to the variable in the
LC700 pointed by STOP_SCAN_ADDRESS. The block writes TRUE in the variable when it is
necessary to enable and FALSE when it is required to disable the FIFO data logger.
•
If data supervision is normal (for example, if a HMI system communicates normally with a
supervision Block-CCSM) in the scan of the CCDL Block, it will monitor the Modbus variable
pointed by NEED_SCAN_ADDRESS to know if there is any data in the Data Logger. If the variable
is not zero it indicates that there’s data in the Data Logger. Parameter LOGGER_ADDRESS points
to an address of beginning of the data logger block (FIFO.CTW). The parameter NUM_REGISTER
shows the amount of registers stored on the CCDL Block.
1 – Parameter TYPE_OF_LOG
It sets the time_stamp of the data logger.
2 – Parameter P_EU_ADDRESS_A1
It sets the conversion scale and the data format of the FIFO Block data logger (these parameters
must have the same configuration of the respective FIFO data logger in the LC700). For further
information about Scale Conversion, refer to the Appendix C. User will have to set the following
parameters:
9
FROM_EU_100%
9
FROM_EU_0%
9
TO_EU_100%
9
To_EU_0%
9
DATATYPE
Choose the format of data read from the device. Data types supported by the data logger (they will
be converted to float) are: float and Integer16.
9
MODBUS_ADDRESS_VALUE
Not used.
•
Blocks in Cascade - The CCDL block can store up to 280 registers. If the CCDL block is not
enough to store all data stored in the FIFO, it is possible to put blocks in cascade as many
times as necessary and set all of them with the same information (MODE_BLK,
SLAVE_ADDRESS, NEED_SCAN_ADDRESS, LOGGER_ADDRESS, etc). So when the data
logged brought from the FIFO block do not fit in the CCDL and there is another CCDL block set
for that FIFO, this block will receive the rest of the data log. The CCDL block indicates in the
parameter NEXT_BLOCK_LOG which is the next block containing the rest of the data logged.