| 摘要 |
<p>When a read command is sent from a command device (24a, 24b, 24c, ···) to a communication control apparatus (20), a communication program (30) refers to a PLC address table (32) and cites a PLC address, including a communication protocol of the PLC (28a, 28b, 28c, ···) identified by the read command. The communication program (30) translates the read command using a protocol translation table (34) and transmits the translated read command to the PLC (28a, 28b, 28c, ···). The communication program (30) translates data read from the PLC (28a, 28b, 28c, ···) using the protocol translation table (34), and stores the translated data in a tag file (38).</p> |
