2 . Pr ogr am m i ng Conc e pts2- 6 5b) Manual mode (M1352): When manual mode is selected, times of polling cycle in D1431has to be set up. A full polling cycle refers to the completion of accessing all Slaves. WhenPLC LINK is enabled, D1432 starts to store the times of polling. When D1431 = D1432,PLC LINK stops and M1352 is reset. When M1352 is set ON again, PLC will start thepolling according to times set in D1431 automatically.c) Note: Auto mode M1351 and manual mode M1352 cannot be enabled at the same time. IfM1351 is enabled after M1352 is ON, PLC LINK will stop and M1350 will be reset. Communication timeout setting can be modified by D1129 with available range 200≦D1129 ≦ 3000. PLC will take the upper / lower bound value as the set value if thespecified value is out of the available range. D1129 has to be set up before M1350 =ON. PLC LINK function is only valid when baud rate is higher than 1200 bps. When baudrate is less than 9600 bps, please set communication time-out to more than 1 second. The communication is invalid when data length to be accessed is set to 0. Access on 32-bit high speed counters (C200~C255) is not supported. Available range for D1399: 1 ~ 230. PLC will take the upper / lower bound value as theset value if the specified value exceeds the availanle range. D1399 has to be set up before enabling PLC LINK. Setting up this register during PLCLINK execution will not take effect. Advantage of using D1399 (Designating the ID of starting Slave):In old version PLC LINK, PLC detects Slaves from ID1 to ID16. Therefore, when PLCLINK is applied in multi-layer networks, e.g. 3 layers of networks, the Slave ID of 2ndand 3rd layer will be repeated. When Slave ID is repeated, i.e. the same as Master ID,the Slave will be passed. In this case, only 15 Slaves can be connected in 3rd layer. Tosolve this problem, D1399 can be applied for increasing the connectable Slaves inmulti-layer network structure.
