怎么没人回复啊？各位谁知道AB有没有高速模拟量模块啊？多谢了

肯定跟踪不了的。不仅是A/D转换，总线RPI时间，CPU扫描等等均限制了在一个周波20ms能完成的时间。

即使跟踪过来，有什么意义？

最好选择专门的电力表，有带故障或者事件触发录波的。

但是现在控制器是不能变了，怎样才能把跟PLC连上呢？

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100-C43KF10 AC220V 1784-PKTX 100-FA11 195-GA11 1747-L532 1746-A13 1746-IB16 1746-NI16I 1746-NO4I 1746-OW16 1746-P4 1747-L542 1747-M13 1756-N2 1784-PKTX 1746-A13 1746-IB16 1746-NI16I 1746-NO4I 1746-OW16 1746-P4 1747-L542 1747-M13 1756-N2 1784-PKTX 1746-IB32 1746-NI16I 1746-NI8 1746-NO4I 1746-NR8 1746-OB32 1746-P4 1747-L551 1747-M13 1747-L532 1747-L542 802T-DTP 140-MN-1000 160-BA06NPS1P1 1746-IB32 1746-NR8 100-C12*10 100-C30*00 100-C60*00 100-C85*00 700-CF400 100-FPTB180 193-EA2CB 195-GA10 800E-3X01 800E-3X10 800E-A3L 100-C12*10 AC110V 100-C30*00 AC110V 100-C60*00 AC110V 100-C85*00 AC110V 100-FPTB180 193-EA2CB 195-GA10 700-CF400 AC110V 195-GA10 100-C60KF00 1792D-8BVT8D 802T-ATP 1794-L34 1746-IM16 800T-FXA5 800T-FXD4 800T-PT16 1770-XYB 100-B180NA3-09 100-C60KF00 100-C85KF00 100-FA11 100-SB11 140-A11 140-MN-1600 193-A1M7 700DC-P1200Z1 115~-125VD 700DC-P400Z1 115~-125VDC 1762-L24BWA 100-B180NA3-09 100-C12X10 100-C16X10 100-C30X00 100-C37X00 100-C43KF00 100-C43X00 100-C72X00 140-CMN-6300 193-A5M5 100-C60-KD00 110V 100-C85-KD00 110V 100-FA11 100-FA22 1771-0FE2 1762-L24BWA 100-C12KF10 100-C16KF10 100-C30KF00 100-C37KF00 100-C43KF00 100-C72KF00 1756-A13 1756-A7 1756-IB32 1756-L55M23 1756-N2 1756-OB32 1756-PA72 1756-SRC1 1756-TBCH 1757-SRM 1784-PCIC 1786-BNC 1786-RG6 1786-TPR 1786-XT 1756-A13 1756-A7 1756-IB32 1756-L55M23 1756-N2 1756-OB32 1756-PA72 1756-SRC1 1756-TBCH 1757-SRM 1784-PCIC 1786-BNC 1786-RG6 1786-TPR 1786-XT 1336F-B040-AA-EN 800T-B2A 800T-H2A 800T-H2B 800T-P26G 800T-P26R 800T-PD24G 100-DNY42R 193-EA4DB 193-EA4FB 1201-HAS2 1794-ID2 1794-IE8 1746-IM16 1746-P2 1746-P4 1747-L541 195-GA02 195-GA20 199-MCD1 800EP-SM32 1746-IM16 1746-P2 1746-P4 1747-L541 1757-SRC1 195-GA20 195-GA20 700-HA33Z24 800E-3X01 100-B250NA3-09 AC220V 195-GA11 802T-NPTPV 800T-H2D1 100-C23KF10 1756-BATA 1746-IB16 1746-IB16 9324-RLD200ENE 9355-WABOEMENE 9357-CNETL3 1746-IB16 1746-IB32 1746-N14 1746-OB16 1746-OB32 1746-P1 1746-P2 1746-P3 1747-L511 1747-L531 1746-NI4 1746-P1 1756-BA1 1786-RG6 1786-TPYS 800T-J2KC1B 1746-NI4 1746-RL54 1747-L542 100-B180ND3-09 180A 100-B250ND3-09 250A 100-B300ND3-09 300A 100-C85KD10 85A 1746-A10 1746-C9 1746-IA16 1746-ITV16 1746-NI4 1746-NR4 1746-OW16 1746-P2 1747-L543 64K 2711-K5A5 2711-NC13 1761-L32AWA 1746-ASB 1746-IM16 1746-L541 1746-NI4 1746-NI8 1746-NO4I 1746-OA16 1746-OBP16 1746-P4 1747-L532 1747-SN 1770-CD4 1784-PCMK 1747-ASB 1747-L541 1784-KTX 1746-A7 1746-IM16 1746-N2 1746-OA16 1746-P3 1747-L542 100-C85KD00 85A 100-FA11 1771-0FE1 1771-OW 1794-1B16 1747-L531 1746-P2 1794-IB16 1746-IB16 100-C43KF00 1746-A7 1305-BA09A 193-EPM1 1746-A4 1746-P2 1747-L552 194L-E20-3504 150-A180NBDA 1746-NR4 1746-OW16 1746-OX8 1747-L542 802T-ATP ACS150-01E-02A4-2,ACS150-01E-04A7-2,ACS150-01E-06A7-2,ACS150-01E-07A5-2,ACS150-01E-09A8-2,ACS150-03E-01A2-4,ACS150-03E-01A9-4,ACS150-03E-02A4-4,ACS150-03E-03A3-4,ACS150-03E-04A1-4,ACS400-IF21-3,ACS400-IF31-3,ACS400-IF41-3,ACS400-IF22-3,ACS-CHK-A3,ACS-CHK-B3,ACS-CHK-C3

PLC   可能很难满足你的要求，即使模块的相应速度足够快，但是程序扫描也需要时间。如果你单单是幅值检测建议采用专业的电力仪表，然后采用通讯的方式和PLC交换数据。