VTAM® issues this message in response to a DISPLAY ID command requesting the status of a channel-attachment major node for a communication-adapter line.

sio is the number of start-I/O operations counted for the node. This number is cumulative (from the time that the node was last activated). The value of sio is never larger than 65535. If sio is 65535, its value is reset to 0 when the next start I/O operation takes place. If the value of sio is unavailable, VTAM issues ***NA***.

count is the number of I/O errors counted for the node. This number is cumulative (from the time that the node was last activated). VTAM issues ***NA*** if count is not available.

device_address is the hexadecimal channel address of the line to which this node is attached. VTAM issues *NA if device_address is not available.