Allen-Bradley 1756-L63XT, Руководство пользователя

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108 Rockwell Automation Publication 1756-UM001O-EN-P - October 2014
Chapter 6 Serial Communication on 1756-L6x Controllers
• You can take advantage of the ControlLogix controller channel-to-channel
passthru to program the other nodes via RSLinx Classic and Logix
Designer applications that run on a personal computer that is connected to
a local ControlLogix controller via DH-485, DH+, or Ethernet network.
DF1 Radio Modem Protocol Parameters
Use Table 25 as a reference when setting the parameters for the use of the DF1
Radio Modem Protocol.
Table 25 - DF1 Radio Protocol Parameters
Parameter Description
Station Address Specifies the node address of the controller on the serial network. Select a number 1…254 decimal, inclusive.
To optimize network performance, assign node addresses in sequential order. Initiators, such as personal computers, are assigned the lowest
address numbers to minimize the time that is required to initialize the network.
Error Detection Click one of the radio buttons to specify the error detection scheme that is used for all messages.
• BCC - the processor sends and accepts messages that end with a BCC byte.
• CRC - the processor sends and accepts messages with a 2 byte CRC.
Enable Store and Forward Check ’Enable Store and Forward’ if you want to enable the store and forward functionality. When enabled, the destination address of any
received message is compared to the Store and Forward tag table. If there is a match, the message is then forwarded (rebroadcasted) out the
port.
From the Store and Forward Tag pull-down menu, choose an integer (INT[16]) tag.
Each bit is a station address. If this controller reads a message that is destined for a station that has its bit set in this table, it forwards the
message.