Unipulse F701-P, Руководство по эксплуатации

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9 RS-485 INTERFACE
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Example 2) Change the upper limit (address 40001 - 40002) to 99999 (0x0001869F) and
the lower limit (address 40003 - 40004) to 5000 (0x00001388) in the 32-bit
wide integer data area.
Keep in mind that the relative address for writing in upper limit is 0x00.
* In function code 16, if the lower word in the 32-bit wide integer data area is designated at the
start address, or the higher word in the 32-bit wide integer data area is designated at the end of
the start a number of registers, an error response is returned.
11 (0x0B) Get comm event counter
The event counter is incremented by one each time each slave processes a request.
It is not incremented if there is an error in any frame or by reading other counters.
With the master, whether or not processing is executed can be judged by reading this counter before
and after the request.
As status, 0x0000 (slave is not busy) is always returned.
Example) Read the event counter.
The example shows the case of 264 (0x0108) commands having been processed so far in a not-
busy state (0x0000).
[Request]
Function 10
[Response]
Function 10
Start address; higher 00 Start address; higher 00
Start address; lower 00 Start address; lower 00
Register; higher 00 Register; higher 00
Register; lower 04 Register; lower 04
Number of data bytes 08
Upper limit (higher); higher 00
Upper limit (higher); lower 01
Upper limit (lower); higher 86
Upper limit (lower); lower 9F
Lower limit (higher); higher 00
Lower limit (higher); lower 00
Lower limit (lower); higher 13
Lower limit (lower); lower 88
[Request]
Function 1
byte
0x0B
[Response]
Function 1
byte
0x0B
Status 2
byte
s 0x0000
Event counter 2
byte
s 0x0000 - 0xFFFF
[Error response]
Error code 1
byte
0x8B (fu 0x80)
Exception code 1
byte
01
[Request]
Function 0B
[Response]
Function 0B
Status; higher 00
Status; lower 00
Event counter; higher 01
Event counter; lower 08