Instance 03h Attributes (Heartbeat, Input-Only)
This instance is used as heartbeat for Input-Only connections. The data size of the Heartbeat instance in the Forward_Open-request should be 0 bytes, however other values are also permitted.
# | Name | Access | Type | Value/Description |
|---|---|---|---|---|
3 | Data | Set | N/A | - (The data size of this attribute is zero) |
4 | Size | Get | UINT | 0 (Number of bytes in attribute 3) |
The instance number for this instance can be changed by implementing the corresponding attribute in the EtherNet/IP Host Object.