Micrologix1400 Rslogix500 CPW-COPY WORD-MODBUS READ/WRITE
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- Опубліковано 16 вер 2024
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PLC: Allen Bradley 1766-L32AWA
PLC IP Address: 192.168.0.90
Modbus Mapping:
N7:0 --- HDR 40001
N7:1 --- HDR 40002
N7:2 --- HDR 40003
F8:0 --- HDR 40005,40006
F8:1 --- HDR 40007,40008
F8:2 --- HDR 40009,40010
PLC Logic:
N7:0 + N7:1 = N7:2
F8:0 x F8:1 = F8:2
PLC Programming:
Testing with Modscan32…
Save my life my friend.... Good job...👍
Helpful Sir..Thank You...
@Vikalp Joshi: Thank you for subscribing to my channel.
Hello SY. Great videos! I'm trying to read a 32 bit floating point value from MircroLogix 1400 on a PanelView 800 through Modbus w/ RS 232. Any suggestions? I seem to only be able to read integer values on the PanelView.
@Brandon Lam: It does not matter if it is INT, DINT or REAL between ML1400 and Panelview800. This video shows you how to break data into INT 8 bit for Modbus communication. On the other end at Panelview 800, if you select Modbus for Communication Protocol, when you create tags under "Tags" and select DINT/REAL for "data type" and specify the Modbus Address, it will automatically pick up to Modbus registers to combine back into a DINT/REAL to display on the HMI. Hopefully you get an idea. Thank you for subscribing to my channel. Should you have any questions, please let me know.
what if I want to read data from three MOBUS TCP stations ?
@ica8836: It should not be a problem. First all your 3 devices need to be on the same network. Second, you need all 3 device IP addresses to set up the communication on your master PLC. The procedure should be the same. What is your master PLC? Micrologix1400 or Micro850 PLC?
Micrologix1400 CLIENT/MASTER PLC: ua-cam.com/video/Vsztd7BMmdA/v-deo.html
Micro850 CLIENT/MASTER PLC: ua-cam.com/video/F0R90ZiI1Mg/v-deo.html
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How the modbus registers values are related to the integers N7:4, N7:6 and N7:8?
@Visakh Viswanathan: @0:59 All "Holding Registers (4XXXX)" will get values from "N7" (Data File). Modbus Holding Registers 4XXXX starts from 40001 and Data File N7 starts from N7:0. For example: Values from N7:4 and N7:5 are sent to HDR 40005 and HDR 40006. That is how the Modbus mapping works. Thank you for subscribing to my channel. Should you have any more questions, just let me know :)
Hi , I need to read 64 float bit in micrologic 1400 plc how can make
@SAMIULLA SK: To read 32bit float back from Modbus, you can use "CPW" instruction for "Copy Word" with the "Length" of 2. (2 is for 2 consecutive16-bit words from Modbus that make 1 32-bit float.) Hopefully this helps. Thank you for subscribing to my channel. Please let me know if you have any more questions.