16.3.14
img
: Parameter Set Memory Image
Format:
Data0
0aaaaaaaB
Data1
0bbbbbbaB
Data2
0cccccbbB
Data3
0ddddcccB
:
:
During data transfer, the memory image data of the parameter set to be sent is read sequentially in
1-byte units starting from the first address. That value is transformed starting from the lower bit to a
7-bit wide data string.
Example: 33-byte data transfer
In the case of memory image transfer of the 33 bytes such as Table
1, for example, the transfer image is transformed to 38 bytes as shown in Table 2.
Table 1
7
6
5
4
3
2
1
0
Memory data 00:
[00.7]
[00.6]
[00.5]
[00.4]
[00.3]
[00.2]
[00.1]
[00.0]
Memory data 01:
[01.7]
[01.6]
[01.5]
[01.4]
[01.3]
[01.2]
[01.1]
[01.0]
Memory data 02:
[02.7]
[02.6]
[02.5]
[02.4]
[02.3]
[02.2]
[02.1]
[02.0]
:
Memory data 32:
[32.7]
[32.6]
[32.5]
[32.4]
[32.3]
[32.2]
[32.1]
[32.0]
(Bit M of the NNth byte is indicated at [NN.M].)
Table 2
7
6
5
4
3
2
1
0
Send data 00:
0
[00.6]
[00.5]
[00.4]
[00.3]
[00.2]
[00.1]
[00.0]
Send data 01:
0
[01.5]
[01.4]
[01.3]
[01.2]
[01.1]
[01.0]
[00.7]
Send data 02:
0
[02.4]
[02.3]
[02.2]
[02.1]
[02.0]
[01.7]
[01.6]
:
Send data 37:
0
0
0
[32.7]
[32.6]
[32.5]
[32.4]
[32.3]
Though transferred data always sequentially uses from bit 0 through bit 7, unused upper bit fields in
the final transfer data are filled in with 0.
Parameter Set Packet Splitting
When a parameter set is transferred, a single parameter set memory
image can be split so it can fit into the preset transfer message size, and transferred as multiple packets.
Even when a packet is split, the memory image must be transferred from the beginning in the sequence
it is arranged without interruption. When sending a parameter set to the Instrument, the size of a
System Exclusive message for a single packet must fit within a preset size. The parameter set memory
image to be transferred can be split into 1-byte units, and it does not matter whether the length of each
packet is different. When a packet receive error is generated, the sending device needs to resend, but
the size of the packet sent does not necessarily need to be the same size as the packet sent when the
error was generated. Even the sizes of parameter sets are small, using a single packet to send multiple
parameter sets is not supported. With this Instrument, the data size, transfer time interval, and other
communication parameters for split packets can be adjusted using the parameters described under “20.2
System Exclusive Protocol Parameter”. For details, see “20.2 System Exclusive Protocol Parameter.”
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