Mitsubishi Electric Melsec Q Series User Manual page 188

7
MES INTERFACE FUNCTION CONFIGURATION TOOL
(5) DB buffering full
(6) DB buffer utilization
7
- 30 7.6 System Setting
7.6.4 Setting items in DB buffering setting
(a) Select a tag component into whose device the status of whether the DB buffer
(Automatically resend buffer or Manually resend buffer) is full or not is stored.
Note that the following tags are not selectable.
• Tags for which [Prohibit data writing] is enabled
• Tags for which [Array setting] is set.
(b) Data are stored as follows depending on the data type.
Data type of tag
component
Bit
Other than the above
(c) When the DB buffer becomes full, even if a DB-buffering-enabled job is activated,
its SQL texts are discarded without being buffered.
Note that execution of a DB-buffering-enabled job is not canceled.
Check [DB buffer utilization] shown in (6) to prevent the "DB buffer full" status.
(a) Select a tag component into whose device the utilization of the DB buffer area
(Unit: %) is stored.
Note that the following tags are not selectable.
• Tags for which [Prohibit data writing] is enabled
• Tags for which [Array setting] is set.
(b) Data are stored as follows depending on the data type.
Utilization rates of the Automatically resend buffer and Manually resend buffer are
compared, and the greater buffer utilization rate is stored as a value.
Data type of tag
component
Bit
Other than the above
*1 Stored as an integer value. (Digits after decimal point are truncated.)
Table 7.31 Values stored in [DB buffer full]
OFF: DB buffer is not full.
ON: DB buffer is full.
0: DB buffer is not full.
1: DB buffer is full.
Table 7.32 Values stored in [DB buffer utilization]
OFF: Not accumulated
ON: One or more data accumulated
0: Not accumulated
Other than 0: Utilization of DB buffer area (Unit: %)
Description
Description
*1