Oriental motor BLH Series - Communication Monitor

94
Modbus RTU control (RS-485 communication)
11.9.5 Conguration
Response
Master
Slave
In
ternal processing
Internal processing is in progress
Communication
∗4
Query ∗1 Query
∗5
∗2
∗3
*1
A message including a query for conguration via RS-485 communication
*2
P1 "transmission waiting time" parameter + C3.5 (silent interval) + command processing time
*3
C3.5 (silent interval) + 2 ms or less
*4
1 s or less
*5
Execute a query after the driver internal processing is completed.
(Avoid an ON state of SYS-BSY such as a state where Conguration is being executed.)
•
If writing is executed in an internal processing state, an communication error occurs.
•
The same state will occur if the maintenance command which processing time is long such as "Write batch NV
memory." Refer to "12.5 Maintenance commands" on p.99 for corresponding commands.
11.10 Communication monitor
Out of monitor items related to RS-485 communication, items that can be monitored are shown below. Each item can be
checked on the RS-485 communication monitor of the
MEXE02
or via RS-485 communication.
Refer to p.108 for the address of each monitored items.
Monitored items Description
Communication error Monitors the communication error code received last time.
RS-485 communication Reception frame counter
Monitors the number of frames received.
The target to count the number of frames received can be selected
using the "RS-485 Receive packet monitor" parameter.
RS-485 communication Normal reception frame counter (All) Monitors the number of normal frames received.
*
RS-485 communication Normal reception frame counter
(Only own address)
Monitors the number of normal frames received to own address.
*
RS-485 communication Abnormal reception frame counter (All) Monitors the number of abnormal frames received.
*
RS-485 communication Transmission frame counter Monitors the number of frames transmitted.
RS-485 communication Reception byte counter Monitors the number of bytes received.
RS-485communication Transmission byte counter Monitors the number of bytes transmitted.
RS-485 communication Register write abnormal counter
Monitors the number of times that the received data is abnormal
(outside setting range, command execute disable, etc.).
*
The judgment of whether it is normal or abnormal is performed based on the mismatched CRC and no missed received data
(C1.5).