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| Measurement type | I/O tag type | Communication function | Documentation |
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| Current values | AI | PRINT MINUTE | Command Response String 6 – 16, 17 |
| Current values flags | DI | PRINT MINUTE | Command Response String 6 – 16, 17 |
| 1m averages | AI | PRINT MINUTE | Command Response String 6 – 16, 17 |
| 1m average flags | DI | PRINT MINUTE | Command Response String 6 – 16, 17 |
| 30m averages | AI | PRINT AUX | Command Response String 6 – 14, 15 |
| 30m average flags | DI | PRINT AUX | Command Response String 6 – 14, 15 |
| 60m averages | AI | PRINT HOUR | Command Response String 6 – 7, 8 |
| 60m average flags | DI | PRINT HOUR | Command Response String 6 – 7, 8 |
| Digital inputs | DI | SENSE IN | Command Response String 6 – 9, 10 |
| Calibrations | AI | PRINT CAL | Command Response String 6 – 12, 13 |
| Real-time – writewriting | TOA | SET TIME | Command Response String 6 – 20 |
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- Communication protocol: ESC 8800.
- Station The station address is a decimal number within the range of 0..255 specified as a decimal number or as a hexadecimal number with a hash at the beginning (e.g. #0A). Station The station address must be identical with to the datalogger settings - the command SET ID command.
Station configuration is different from implementation in the versions D2000 v3.XX. There are used The station time parameters and their priorities are used, one datalogger device must be divided into logical stations as follows:
- Current values - : the delay - at at least 1 second, station priority - 0. Current measurements of channels and digital inputs are configured on the at this station. Logical This is a logical station with the lowest priority, the parameters delay parameter may not be less than 1 second.
Note: datalogger Datalogger 8800 does not provide any current data - the data are acquired from one-minute averages. Therefore it is not necessary to create the station. - 1m averages - the period - 1 1 minute, the offset - 5 5..10 seconds, station priority - 1. There are configured 1m One-minute averages of channel measurement on the measurements are configured at this station. Logical This is a logical station with a higher priority, the parameter offset couldnshouldn't be less than 5 seconds - this is the time provided for the datalogger for processing values.
- 30m averages - the period - 30 30 minute, the offset - 5 5..10 seconds, station priority - 2. There are configured 30m 2. Thirty-minute averages of channel measurements are configured on the this station. Logical This is a logical station with even higher priority, the parameter offset couldnshouldn't be less than 5 seconds - this is the time provided for the datalogger for processing values. The Setting the period of to 30 minutes must be initialized in the datalogger by using the command "SET INT 30". ,
- Calibrations – station with a required period for reading calibration results.
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Station protocol parameters
There can be defined the The following station protocol parameters can be defined:
Table 2
| Keyword | Full name | Meaning | Unit | Default value | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Retry Count | Poll repetition count The number of request repeats in case of a communication error. | - | 2 | ||||||
| Retry Timeout | Delay between poll repetition The delay between individual request repeats in case of a communication error. | ms | 1000 ms. | ||||||
| Wait First Timeout | Delay The delay after transmitting the poll request before reading the response. | ms | 500 ms. | ||||||
| Wait Timeout | Delay The delay between response readings till until its finalization. | ms | 400 ms. | ||||||
| Max Wait Retry | Repetition count The number of repeats of response readings till until its finalization. | - | 8 | ||||||
| Get Stored Interval | Period, during which there are read The size of the period, for which the archive data from the datalogger are read without interruption. The period is given specified in minutes. If the value of the period is e.g. 60 minutes, so there are read all archive data from e.g. June 3rd 1996 05:00 to 06:00 are read, then data from 06:00 to 07:00 etc. Loading The reading of archive data within the from this period couldnshouldn't take more than one minute, because there could be lost some otherwise some of the current data, acquired among archive readings, could be lost. | min | 10 min. | ||||||
| Validity Percent | Valid measurements measurement percentage for making declaring the measured interval valid. | % | 67.000 |
String A string containing the protocol parameters is being defined as follows:
Keyword=value;Keyword=value; ...
Example:
RC=1;RT=500;MWR=10;
If there is used a keyword with an invalid value is used in the initialization string, there will be used the corresponding default value according to the table 2 will be used.
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Support of communication with ESC 8800 comprises acquisition and setting of the following values:
- reading of current values of measured parameters with flags,
- reading of 1m, 30m, and 60m averages with their respective flags,
- reading of current states of digital inputs,
- reading of calibration results.
- setting the real-time.
Current value configuration
I/O tag type is Ai, measurement type is ACTUAL. Channel The channel number is defined as a decimal number within the range of 0..99 99 either specified as a decimal number or as a hexadecimal number with a hash at the beginning (e.g. #0A).
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Current values flags are DI type (Digital Input). Measurement The measurement type is ACTUAL Flag.
Note: At defining the The No missing data <blank> flag , you can use be configured using the character _ (underline) for transparencyclarity.
Configuration of 1m, 30m, and 60m averages
Averages The averages are values of AI type (Analog Input). Measurement type is 1m AV for one-minute averages, 30m AV for half-hour averages, and 60m AV for hour averages. Channel number is defined as a decimal number within the range of 0..99 either specified as a decimal number or as a hexadecimal number with a hash at the beginning (e.g. #0A).
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Flags of averages are values of DI type (Digital Input). Measurement The measurement type is 30mAV FLAG for half-hour averages and 60mAV FLAG for hour-averages.
Note: At defining the The No missing data <blank> flag , you can use be configured using the character _ (underline) for transparencyclarity.
Digital input configuration
Digital inputs are value values of DI type (Digital Input). Measurement The measurement type is Dig.Input. The number of Digital input number is defined as a decimal number within the range of 0..999.
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Calibration results are values of AI type (Analog Input). Measurement The measurement type is CAL-Ph1 for the first calibration phase or CAL-Ph2 for the second calibration phase. Channel number is defined as a decimal number within the range of 0..99 either specified as a decimal number or as a hexadecimal number with a hash at the beginning (e.g. #0A).
Real-time I/O tag configuration
For each station (on logger ESC8800 physicallyfor each physical ESC8800 logger), there can be configured one I/O tag of TOA type containing real-time can be configured. The I/O tag is necessary for real-time synchronisation synchronization - datalogger -> computer.
Acquisition of
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archived (stored) values
Logger The ESC 8800 executes a datalogger performs local archiving of measured values. The values can be requested automatically on when a dispatcher system breakdown is detected or directly by the dispatcher (D2000 HI, D2000 EventHandler) to complete the D2000 dispatcher system archive.
The method described above allows to acquire acquiring calibration values, which are at most 30 day days old, 30m averages for the last 31 days, and 1m averages for the last 60 minutes.
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- Ver. 1.1 – February 8th, 2000 – Document update.
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