1756-A4/ABPLC模塊
XMT及RCV命令分別用于PLC向外界發(fā)送與接收數(shù)據(jù)。當(dāng)PLC處于RUN狀態(tài)下時,通信命令有效,當(dāng)PLC處于STOP狀態(tài)時通信命令無效。
XMT命令將存儲區(qū)內(nèi)的數(shù)據(jù)通過端口傳送出去,當(dāng)存儲區(qū)內(nèi)節(jié)傳送完畢,PLC將產(chǎn)生一個中斷,命令格式為 XMT TABLE,PORT,其中PORTPLC用于發(fā)送的通信端口,TABLE為是數(shù)據(jù)存儲區(qū)地址,其*個字節(jié)存放要傳送的字節(jié)數(shù),即數(shù)據(jù)長度,大為255。
RCV命令從的端口讀入數(shù)據(jù)存放在的數(shù)據(jù)存儲區(qū)內(nèi),個字節(jié)接收完畢,PLC也將產(chǎn)生一個中斷,命令格式為RCV TABLE,PO RT,PLC通過PORT端口接收數(shù)據(jù),并將數(shù)據(jù)存放在TBL數(shù)據(jù)存儲區(qū)內(nèi),TABLE的*個字節(jié)為接收的字節(jié)數(shù)
1756-A4/ABPLC模塊
1756
MFR. PART NUMBER DESCRIPTION
1756-A10 10 SLOT CONTROLLOGIX CHASSIS
1756-A13 13 SLOT CONTROLLOGIC CHASSIS
1756-A17 CHASSIS 17 SLOT CONTROLLOGIX
1756-A4 4 SLOT CONTROLLOGIX CHASIS
1756-A7 7 SLOT CONTROLLOGIX CHASSIS
1756-BA1 LOGIX5000 BATTERY ASSEMBLY
1756-CFM 2 CHANNEL /2 OUT CONFIGURABLE FLOWMETER
1756-CNB CONTROLNET BRIDGE MODULE
1756-CNBR CONTROLNET REDUNDANT BRIDGE MODULE
1756-CP3 LOGIX5000 RS232 PROGRAMMER CABLE
1756-DHRIO 2 CHANNEL DH+ AND/OR RIO SCANNER
1756-DNB DEVICE NET BRIDGE/SCANNER MODULE
1756-DPALEN CONTROLLOGIC SYSTEM DOCUMENTATION SET PRINTED
1756-ENET ETHERNET/IP BRIDGE MODULE
1756-GTWY CONTROLLOGIC GATEWAY CONFIGURATION SOFTWARE
1756-GTWYR SUPT REINSTATEMENT CONTRACT FOR 1756GTWY
1756-GTWYS SUPT RENEWAL CONTRACT FOR 1756GTWY
1756-HSC 2 CHANNEL /4 OUTPUT HIGH SPEED COUNTER
1756-IA16 79-132 VAC INPUT 16PTS
1756-IA16I 79-132 VAC ISOLATED INPUT 16PTS
1756-IA8D VAC DIAGNOSTIC INPUT 8PTS
1756-IB16 VDC INPUT 16PTS
1756-IB16D VDC DIAGNOSTIC INPUT
1756-IB16I VDC ISLOTED INPUT 16PTS