1) S7-400 has 1 central racks, which can be extended to 21 extended stands. Multiple CPU processing using UR1 or UR2 rack can be installed up to 4 CPU. 6 IM (interface modules) are used at most in each center frame, and 6 S5 modules can be connected to the central machine frame through the … Continue reading Common characteristics of CPU S7-400 module
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CPU S7-400H/F/FH
414-4H CPU and 417-4H CPU is a S7-400H fault tolerant automatic control system and S7-400F/FH security type automatic control system of the CPU module, with a F running authorization, you can compile and run the F user program.They have two slots for the installation of sync modules.
S7-400 power module
The power supply module of S7-400 provides 5V DC and 24V DC power supply to each module through the back board. Output current ratings are 4A, 10A, and 20A. PS 405 of the input for the DC voltage, PS 407 of the input for the DC voltage or AC voltage, S7-400 with a redundant function … Continue reading S7-400 power module
STEP 7 hardware configuration task
The PLC control system design of the early, first of all, should according to the system input and output signal properties and points, and the function of the control system requirements, determine the hardware configuration of the system, such as types of CPU module and power module and need to which input / output module … Continue reading STEP 7 hardware configuration task
PLC ladder diagram input signal conditioning program
whatever the input signal X20 High level havs Any time,They are generating a pulse signal width， It can be the input signal sorting program, which was to became unified pulse signal,you can see the PLC ladder diagram programming
Start, hold, stop circuit ladder diagram
Omron PLC Failure Analysis and Troubleshooting
1, Q: What kind of floating-point advantage in the result of the operation, he is not a small point and carry bit? Floating point and double precision floating point, what kind of difference?A: decimal floating point arithmetic with support, which is its advantage, floating-point operations per participation operations accounted for two-channel and double precision floating … Continue reading Omron PLC Failure Analysis and Troubleshooting
Omron PLC and Siemens touch screen Communication setting method
OMRON PLC can not communicate with TP177B / DP touch screen, But TP177A / DP and other communication with the screen (have repeatedly tested)Specific settings Communication Notes:(1) All communication settings (HMI and PLC) must be consistent (station number, baud rate, parity, etc., Use the default values here namely: "9600,7, Even / even, 2");(2) CPU-42H 4 feet should … Continue reading Omron PLC and Siemens touch screen Communication setting method
Omron PLC technical problems and solutions
A, normally-off mark What does this mean? Under what circumstances can use normally-off signs, normally-off flag at what time it is turned on?(Normally open) Under what circumstances will the conductor, generally not allowed to handle the case 1.P_OFF bit set to ONFor example, CNT command, if a customer is not allowed in any case reset, … Continue reading Omron PLC technical problems and solutions
Siemens S7 PLC address register load and transmission
Format: LAR1Note: the load address of the operand register 1 (ARl);Format: LAR2Note: the load address of the operand register 2 (AR2);Format: TAR1Description: pass the contents of the ARl to store or AR2;Format: TAR2Description: pass the contents of the ARl to store or AR2;Format: CARDescription: swaps the contents of ARl and AR2 LARl P#I0.0 //input I0.0 … Continue reading Siemens S7 PLC address register load and transmission
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