Timing For Programmable Controller Cpu Monitoring - Mitsubishi MELSEC L Series User Manual

2.2.3 Timing for programmable controller CPU monitoring

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2 USING THE PROGRAMMABLE CONTROLLER CPU MONITORING FUNCTION
The following explains the timing for programmable controller CPU monitoring when
the programmable controller CPU monitoring function is executed.
(1) Programmable controller CPU monitoring using the Q series C24 is performed
continuously at cycle time intervals registered by the user.
(2) Values from 1 to 65535 (unit: 100ms/s/min) can be registered as the cycle time.
Use the following expressions as a reference when registering the cycle time.
(a) When sending device data or the programmable controller CPU status
Cycle time designation > K + sequence scan time + processing time
(b) When notifying through combined use of the modem function
(when notifying)
Cycle time designation > K + sequence scan time + processing time
(when sending data)
Cycle time designation > K + sequence scan time + processing time
The items that appear in the above expressions are explained below:
• K
• Processing time: Processing time for the "Multiple block batch read word
• Data transmission time = 1 / transmission rate × bit count for one byte
• Bit count for one byte portion during transmission =
• Data transmission delay time by the modem: Depends on the modem
specifications, line specifications and line status.
• Modem connection and disconnection time: Depends on the modem
specifications, line specifications and line status.
• Modem initialization time: Depends on the modem specifications.
+ data transmission time
+ data transmission time
+ data transmission delay time of the modem
+ modem connection and disconnection time
+ data transmission time
+ data transmission delay time of the modem
+ modem connection and disconnection time
+ circuit disconnection wait time
When modem initialization has not been
performed, the modem initialization time will be
added. (We recommend that the modem
initialization be performed in advance.)
: 60 ms constant (internal processing time of
the Q series C24)
unit command 0406"
For 1 point : 11.3 ms
For 480 points: 23.4 ms
For 960 points: 36.2 ms
portion during transmission
× byte count for transmission data
1 + data bit count + parity bit + stop bit count
(parity bit = 1, no parity bit = 0)
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