Changing The No-Reception Monitoring Time (Timer 0) - Mitsubishi Electric MELSEC iQ-R Series User Manual

■Data communications using user frames
• When designating the final frame, C24 retrieves an arbitrary portion of data in the received data between the start of the
reception of the current message and the time-out, and ignores (deletes) the data in the final frame portion.
• C24 stores the error code to the 'Data reception result' (Un\G600/616) for the target interface and turns ON the 'CH
reception abnormal detection' (X4, XB) and waits to receive the next data.
Data communication using the nonprocedural protocol (Method 1)
The reception monitoring using Method 1 of the no-reception monitoring time (timer 0) is used to receive a message of which
the receive end code and receive end data quantity have not been determined by a timeout of the no-reception monitoring
time (timer 0) in data communication using the nonprocedural protocol.
• Data is received by C24 until the time is out, the 'CH reception data read request' (X3, XA) turns ON, and waits to receive
the next data.
Ex.
When receiving using the receive end data quantity (Receive end data quantity: 511 bytes)
After 16 bytes of data is received, the 16-byte data is stored in the receive data storage area of the buffer memory by the time
out (timer 0) and the reception data read request signal to the CPU module turns ON.
Target device
C24
Reception data read request signal
(X3/XA)
Data communications using the bidirectional protocol
• C24 ignores (deletes) the received data from the start of reception of the current message to time-out.
• C24 stores the error code to the 'Data reception result' (Un\G600/616) for the target interface.
• When reading received data is completed, C24 transmits a NAK message to the target device, and waits to receive the next
data.

Changing the no-reception monitoring time (timer 0)

Changing the no-reception monitoring time (timer 0)
For the no-reception monitoring time (timer 0), set the number of transmission characters (number of bytes) corresponding to
the data transmission speed set to the target interface to "No-reception monitoring time (timer 0) designation".
Navigation window  [Parameter]  [Module Information]  "Module Name"  [Module Parameter]  "Basic Settings"
 "Various control specification"
Adjust or set the value based on the specifications of the target device.
Nonprocedural no-reception monitoring time method designation (Method 0/1)
For the nonprocedural and no-reception monitoring time method designation, set the method to use the no-reception
monitoring time (timer 0) in data communications using the nonprocedural protocol to "Nonprocedural and no-reception
monitoring time method designation".
Navigation window  [Parameter]  [Module Information]  "Module Name"  [Module Parameter]  "Basic Settings"
 "Various control specification"
Timer 0
Set time
A B C
10 CHANGING DATA COMMUNICATION MONITORING TIME
10.1 No-reception Monitoring Time (timer 0) Setting
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