Cypress CY3274, Руководство пользователя

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36 CY3274 Cypress High Voltage Programmable PLC Development Kit Guide, Doc. # 001-53598 Rev. *G
Kit Operation and PLC Control Panel GUI
Write Message
When this button is pressed, a packet is sent according to the repeater mode, source address type,
destination address type, destination address, service type, payload length, and payload.
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Repeater Mode
If the repeater mode is selected, then the packet is prepared and sent according to the repeater
algorithm. If the normal mode is selected, then the packet is transmitted without using repeater
algorithm. Note that the repeater option is enabled only if the connected PLC node is repeater
compatible. For more information on the repeater, see the application note
AN62487 .
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Number of Hops
When using the repeater mode, this field sets the maximum number of hops that the packet can
be repeated. If the “Continuous” option is selected, then the packet can be repeated for infinite
number of hops. For more information on the repeater, see the application note Powerline
Communication (PLC) Repeater Implementation.
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Destination Address Type
The options available are logical (or extended), physical or group.
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Source Address Type
The options available are logical (or extended) or physical.
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Destination Address
This is the node to which the message is sent.
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Retry Count
This is the maximum number of times a message is sent again by the transmitter if it does not get
an acknowledgement for the transmitted packet.
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ACK Timeout
This parameter sets the maximum time the node waits for the acknowledgement. The possible
values are 500 msec, Auto + 100 msec, Auto + 50 msec, and Auto + 20 msec. The "Auto" value
is the amount of time the acknowledgement takes if the receiver processes the packet
immediately.
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Message Types
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Normal: Normal messaging using only hexadecimal characters.
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Request Data: A hexadecimal message that expects a response from the receiver.
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Response Data: A hexadecimal message sent in response to a request.
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Instant Message: A text message (ASCII characters) to be sent.
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Custom - A hexadecimal message with specified custom command ID.
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Payload
This is the actual data to be sent.
Note If using the GUI in a normal mode with a repeater enabled PLC device, the first two bits of
the payload must be 00; otherwise, the PLC Control Panel GUI shows an error.
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Payload Length
This is the length of the payload in bytes. Values can be in the range 0 to 31 in normal mode. In
the repeater mode, the maximum payload length automatically varies from 13 to 27 depending on
the source and destination address type.
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Infinite Write
If this option is selected, the same message is continuously sent to the remote node until this
option is cleared.