EtherNet/IP Communication
‑247‑
Unfold MD500:C.Data, and select Hex in the Style column.
The parameters under MD500:C.Data are related to PDO mapping. Every two
parameters form a group. 0–23 are I/O Messages Mapping(T‑>O), and 24–27 are I/O
Messages Mapping(O‑>T). As shown in the figure, Data[0] is 0x44, and Data[1] is 0x70,
indicating that TPDO1 is mapped to U0‑68.
By default, I/O Messages Mapping(T‑>O)[0] is U0‑68, I/O Messages Mapping(T‑>O)[1] is
U0‑69, I/O Messages Mapping(O‑>T)[0] is U3‑17, and I/O Messages Mapping(O‑>T)[1] is
U3‑16. These four entries cannot be modified. Otherwise, a fault will occur. Other
entries can be customized.
MD500:I.Data and MD500:O.Data are I/O data during transmission. Values written to
O.Data are actually written into the corresponding parameters according to the
configured mapping. The parameter configured in I/O Messages Mapping(T‑>O)[0] is
uploaded to I.Data regularly.
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