Maple Systems MAPware-7000 - Manual (Page 258)

258 MAPware-7000 Programming Manual
1010-1040, Rev. 02
Reserved Memory in Tag Database for DataLogging
There are a number of system bits and registers in the tag database reserved specifically for
Data Logger functions. Some of these have already been described in the sections above but
here is the complete list:
Register/Coil Tag Name Bytes R/W Recommended
Object
S00012 Refresh Historical Trend Bit Read/Write Set Bit
Description: Use this bit to update or ‘refresh’ the historical trend graph. Note: the
historical trend graph is only updated when you initially call up the screen
with the graph. Therefore, use this bit to refresh the graph without
changing screens.
S00028 thru
S00031 DataLog Group # Log Control Bit Read/Write Toggle Bit
Description: Use these bits to Start/Stop data logging for the specified group when using
Logging Mode: Bit Task. 0= Stop Logging, 1= Start Logging
See ‘How to configure the Data Logger’ section for more information.
S00037 USB Host Menu Trigger Bit Read/Write Set Bit
Description: Use this bit to display a menu that allows you to download the DataLog file
to a USB Flash Drive. See “Viewing Data from the Data Logger’ section for
more information.
SW0002 Logger Memory % Usage 16-bit
Register Read Only Numerical Data
Description: This register shows a percentage of the allocated DataLog memory that has
already been used by the Data Logger.
SW0003_00 Logger Memory Full Status Bit 0 of
16-bit
Register Read Only Bit Lamp
Description: Use this bit to indicate when the Data Logger memory is full and has
stopped logging. Note: this bit can also be tagged to an alarm message
using the Alarm feature. See Chapter 7 – Alarms for more information.
SW0003_01 Logger Memory Clear Status Bit 1 of
16-bit
Register Read Only Bit Lamp
Description: This bit indicates when the HMC7000 is clearing the Data Logger memory.
When this bit is 1, clearing memory is in process. When this bit is 0, process
is completed.