Communication Parameters
- Last UpdatedAug 04, 2025
- 3 minute read
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UNINTENDED EQUIPMENT OPERATION Do not change these protocol parameters, except on the advice of Technical Support for this product. Failure to follow these instructions can result in death, serious injury, or equipment damage. |
Note: At times during the life cycle of a driver, circumstances may call for the creation of specific citect.ini parameters that remain undocumented. Always seek the advice of Technical Support regarding the possible implementation of undocumented parameters before you make any changes to a citect.ini file.
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[IEC870IP] Parameter |
Description |
Allowable Values |
Default Value |
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CommandTimeout |
Specifies how long the driver will wait for acknowledgment of a command sent to a device. Note: You can set this parameter for every device connected to a specific port. See Port-specific Parameters. |
0 - 32767 |
15000 |
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ConnectionTimeout |
Specifies how long the driver will wait for the TCP/IP connection to be established with a device before setting the device offline. Note: You can set this parameter for every device connected to a specific port. See Port-specific Parameters. |
0 - 32767 |
30000 |
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DelayChannelOffline |
Specifies how long driver should wait before reporting channel offline if TCP/IP connection is closed from device. Note: This parameter shouldn't be adjusted without advise from support engineer. You can set this parameter for every device connected to a specific port. See Port-specific Parameters. |
0 - 32767 (milliseconds) |
5000 |
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DRIGuaranteedEventsDelivery |
Specifies how the driver acknowledges spontaneous events received from the device. If the parameter is set to 1, the driver will acknowledge a spontaneous event only after it has been successfully delivered to the appropriate Plant SCADA servers. Otherwise that event will be acknowledged immediately after receiving it from the device. |
0 or 1 |
1 |
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DRIResponseTimeout |
Specifies the amount of time the driver will wait for a response from the DRI following delivery of a spontaneous event. Once a response is received, acknowledgment is sent to the device. If a response is not received within the time specified, acknowledgment is still sent to the device, though an error message is logged. See Events Handling. Note: You can set this parameter for every device connected to a specific port. See Port-specific Parameters. |
1000 - 150000 |
1000 |
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GIPollTimeSec |
Specifies how often the driver performs a general interrogation (GI). If the parameter is set to 0, the GI is performed only once when the driver commences data interrogation. |
0 - 32767 |
3600 |
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ReceiveQueueSize |
Sets the maximum number of messages supported by the channel receive queue. If the receive queue if full, the driver will replace the oldest message with a new one. If this occurs, an error message will be recorded in the driver log file. |
100 - 32767 |
1000 |
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ResetSendReceiveSequence |
Specifies whether the driver resets the message send and receive sequence numbers during redundancy switchover. By default, the I/O device which becomes active resets the send and receive sequence numbers after a STARTDT message. |
0 or 1 |
1 |
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TxTestLink |
Specifies how often the driver sends Test Link messages. Setting this parameter to 0 will disable the periodic sending of Test Link messages. (See Configuring Redundancy.) |
0 - 3600000 |
20000 |