Access the DF1 object
The DF1 object provides an interface to the DF1 communication driver.
Attribute | Data Type | Instruction | Description |
|---|---|---|---|
ACKTimeout | DINT | GSV | The amount of time to wait for an acknowledgment to a message transmission (point-to-point and master only). Valid value 0-32,767. Delay in counts of 20 msec periods. Default is 50 (1 second). |
Diagnostic Counters | INT[19] | GSV | Array of diagnostic counters for the DF1 communication driver. |
Word offset | DF1 point-to-point | DF1 slaveMaster | ||||
|---|---|---|---|---|---|---|
0 | Signature (0x0043) | Signature (0x0042) | Signature (0x0044) | |||
1 | Modem bits | Modem bits | Modem bits | |||
2 | Packets sent | Packets sent | Packets sent | |||
3 | Packets received | Packets received | Packets received | |||
4 | Undelivered packets | Undelivered packets | Undelivered packets | |||
5 | Unused | Messages retried | Messages retried | |||
6 | NAKs received | NAKs received | Unused | |||
7 | ENQs received | Poll packets received | Unused | |||
8 | Bad packets NAKed | Bad packets not ACKed | Bad packets not ACKed | |||
9 | No memory sent NAK | No memory not ACKed | Unused | |||
10 | Duplicate packets received | Duplicate packets received | Duplicate packets received | |||
11 | Bad characters received | Unused | Unused | |||
12 | DCD recoveries count | DCD recoveries count | DCD recoveries count | |||
13 | Lost modem count | Lost modem count | Lost modem count | |||
14 | Unused | Unused | Priority scan time maximum | |||
15 | Unused | Unused | Priority scan time last | |||
16 | Unused | Unused | Normal scan time maximum | |||
17 | Unused | Unused | Normal scant time last | |||
18 | ENQs sent | Unused | Unused | |||
Duplicate Detection | SINT | GSV | Enables duplicate message detection. Each value has a specific meaning:
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Embedded ResponseEnable | SINT | GSV | Enables embedded response functionality (point-to-point only). Each value has a specific meaning:
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EnableStoreFwd | SINT | GSV | Enables the store and forward behavior when receiving a message. Each value has a specific meaning:
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ENQTransmit Limit | SINT | GSV | The number of inquiries (ENQs) to send after an ACK timeout (point-to-point only). Valid value 0-127. Default setting is 3. | |||
EOTSuppression | SINT | GSV | Enable suppressing EOT transmissions in response to poll packets (slave only). Each value has a specific meaning:
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ErrorDetection | SINT | GSV | Specifies the error-detection scheme. Each value has a specific meaning:
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MasterMessageTransmit | SINT | GSV | Current value of the master message transmission (master only). Each value has a specific meaning:
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MaxStation Address | SINT | GSV | Current value (0 to 31) of the maximum node address on a DH-485 network. Default is 31. | |||
NAKReceiveLimit | SINT | GSV | The number of NAKs received in response to a message before stopping transmission (point-to-point communication only). Valid value 0 to 127. Default is 3. | |||
NormalPollGroupSize | INT | GSV | Number of stations to poll in the normal poll node array after polling all the stations in the priority poll node array (master only). Valid value 0 to 255. Default is 0. | |||
PollingMode | SINT | GSV | Current polling mode (master only). Default setting is 1. Each value has a specific meaning:
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ReplyMessage Wait | DINT | GSV | The time (acting as a master) to wait after receiving an ACK before polling the slave for a response (master only). Valid value 0 to 65,535. Delay in counts of 20 msec periods. The default is 5 periods (100 msec). | |||
SlavePollTimeout | DINT | GSV | The amount of time in msecs that the slave waits for the master to poll before the slave declares that it is unable to transmit because the master is inactive (slave only). Valid value 0 to 32,767. Delay in counts of 20 msec periods. The default is 3000 periods (1 minute). | |||
StationAddress | INT | GSV | Current station address of the port. Valid value 0 to 254. Default is 0. | |||
TokenHoldFactor | SINT | GSV | Current value (1 to 4) of the maximum number of messages sent by this node before passing the token on a DH-485 network. Default is 1. | |||
TransmitRetries | SINT | GSV | Number of times to resend a message without getting an acknowledgment (master and slave only). Valid value 0 to 127. Default is 3. | |||
PendingACK Timeout | DINT | SSV | Pending value for the ACKTimeout attribute. | |||
Pending Duplicate Detection | SINT | SSV | Pending value for the DuplicateDetection attribute. | |||
Pending Embedded ResponseEnable | SINT | SSV | Pending value for the EmbeddedResponse attribute. | |||
PendingEnable StoreFwd | SINT | SSV | Pending value for the EnableStoreFwd attribute. | |||
PendingENQ TransmitLimit | SINT | SSV | Pending value for the ENQTransmitLimit attribute. | |||
PendingEOT Suppression | SINT | SSV | Pending value for the EOTSuppression attribute. | |||
PendingError Detection | SINT | SSV | Pending value for the ErrorDetection attribute. | |||
PendingMaster Message Transmit | SINT | SSV | Pending value for the MasterMessageTransmit attribute. | |||
PendingMax StationAddress | SINT | SSV | Pending value for the MaxStationAddress attribute. | |||
PendingNAK ReceiveLimit | SINT | SSV | Pending value for the NAKReceiveLimit attribute. | |||
PendingNormal PollGroupSize | INT | SSV | Pending value for the NormalPollGroupSize attribute. | |||
PendingPolling Mode | SINT | SSV | Pending value for the PollingMode attribute. | |||
PendingReply MessageWait | DINT | SSV | Pending value for the ReplyMessageWait attribute. | |||
PendingSlavePollTimeout | DINT | SSV | Pending value for the SlavePollTimeout attribute. | |||
PendingStation Address | INT | SSV | Pending value for the StationAddress attribute. | |||
PendingToken HoldFactory | SINT | SSV | Pending value for the TokenHoldFactor attribute. | |||
PendingTransmitRetries | SINT | SSV | Pending value for the TransmitRetries attribute. | |||
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