Chapter 9: Message transfers
9-2 Transmission buffer
This section describes the transmission buffer that is used for sending and receiving data for the message transfer.
The transmission buffer area (+0000 to 4055(8)) is determined by entering top address to parameter (address 34 to 36(8)). (Parameter 
See Chapter 12.)
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| buffer address(8) |
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| +0000 | Receiving [data section] |
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| to | - When writing 00(H) to address +4000, the received data will be | |
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| transferred to the control module (CPU board) |
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| +1777 |
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| +2000 |
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| Sending [data section] *1 |
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| +3777 |
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| +4000 | Node number of the node sending data. |
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| +4001 | Response message type (always 00(H)) |
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| +4002 to 4003 | Transaction code (response). |
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| +4004 to 4007 | Top address of the virtual address space. | Receiving |
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| Data length of response from the virtual | |
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| +4010 to 4011 | [information section] | |
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| address space (word/byte). | ||
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| +4012 | Current fragment block number (always 01(H)) |
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| +4013 | Total fragment block number (always 01(H)) |
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| +4014 to 4015 | Current block length (byte) |
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| +4016 to 4037 | Reserved area |
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| +4040 | Node number of destination node. *2 |
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| +4041 | Response message type (always 00(H)) |
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| +4042 to 4043 | Transaction code (request). |
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| +4044 to 4047 | Top address of the virtual address space. | *1 Sending |
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| Data length requesting to the virtual address | |
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| +4050 to 4051 | [information section] | |
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| space (word/byte). | ||
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| +4052 | Current fragment block number (always 01(H)) |
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| +4053 | Total fragment block number (always 01(H)) |
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| +4054 to 4055 | Current block length (byte) |
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*1: The data in the transmission area [information section] and [data section] are transferred when 01(H) is written at the base address +301 in the communication control area. After sending data,
*2: Enter 255(D) at the base address +4040. Then the data will be transferred to all the nodes currently connected.