How does Siemens 2PLC realize wireless communication with computer I and adopt modbus protocol? What modules are needed?

GRM2G intelligent GPRS wireless control terminal is a GSM remote measurement and control terminal with PLC and RTU functions. It uses GPRS (the controller needs to be inserted into the SIM card of the mobile phone) as the communication means, and has its own communication port, which can be connected with Siemens, Mitsubishi, Omron PLC or MODBUS equipment and various touch screens and frequency converters to realize computer remote control, remote alarm, remote maintenance and remote payment collection.

Macro Control Technology provides an overall solution including PC software, GRPS control module and cloud monitoring. Customers only need to have a computer with Internet access, so they can easily complete the remote wireless monitoring of PLC.

with the giant cloud monitoring service, any remote computer can access the variables in GRM2G through GPRS, including the PLC variables connected to the communication port and the local IO port (four inputs and four outputs of the switch, four analog signals).

GRM2 system adopts the form of configuration, supports various expressions of alarm, timing control and logic control, and has the flexible programming function of PLC.

using GRM2 wireless control, there is no need to lay communication cables and on-site personnel on duty, which reduces the system construction cost and maintenance cost.

Features:

1: Without programming, data center server and fixed IP, the computer can read and write remote PLC variables through GPRS.

2: it supports reading and writing all the registers of PLC by mobile phone web pages and short messages.

3: Support SMS function and GPRS wireless remote access at the same time to improve the reliability of wireless monitoring. GPRS is always online and reconnects automatically.

4: Support any configuration software through OPC interface, and provide infinite point configuration of macro control for free.

5: The first intelligent GPRS control terminal with PLC programming function in the industry.

6: the industry's first intelligent GPRS control terminal that can be connected with various PLCs, touch screens, configuration software and frequency converters.

7: The first industrial-grade intelligent GPRS control terminal in the industry that passed the anti-interference test of Cybertron Certification Center.

8: The first intelligent GPRS control terminal with intelligent cost management in the industry, which regularly reports the balance and flow of SIM card.

9: Support the alarm option of mains power failure: send an alarm message when power failure occurs.

Overview of functions:

1) Support the monitoring service of the giant control cloud, and the computer can remotely read and write PLC variables as long as it has access to the Internet. Support mobile web access.

2) At the same time, it supports reading and writing all registers of PLC by SMS.

3) GRM2G has its own digital input and analog input, which can be connected with various sensors and switches to realize the function of wireless sensor.

4) if the monitored equipment fails, GRM2G will automatically send an alarm message to the mobile phone of the person on duty and display the alarm on the computer.

5) The personnel on duty can send SMS or control GRM2G on the computer to realize equipment start-stop, parameter setting and fault reset.

6) after the alarm is generated, the power supply of the equipment can be cut off through the relay output of GRM2G. Can be disarmed or deployed by SMS.

7) Equipment information can be sent to the mobile phone of the personnel on duty regularly.

8) You can control the equipment by phone. One end of GRM2G can be controlled without answering, and there is no need for mobile phone calls.

9) supports the alarm of mains power failure, and sends an alarm short message in case of power failure.

Application field:

1: It can be used for remote wireless monitoring, remote maintenance, remote alarm, remote control and remote dunning of PLC.

2: Detection and alarm of temperature and humidity, smoke, water leakage, broken glass, access control, etc. in the computer room.

3: remotely turn on or off industrial equipment such as motors, water pumps and electromagnetic valves.

4: switch status feedback, such as power failure alarm, cable anti-theft, etc.

5: Remote monitoring of dry contact signal status.

6: Remote data communication with industrial equipment field sensing equipment.

7: Wireless intelligent control of street lamps, landscape lamps and city lighting.

8: remotely monitor the liquid level of water tower and high-level pool, and alarm the liquid level of reservoir, water tower and pool.

Reliability guarantee:

1: Industrial-grade design, with photoelectric isolation technology for communication and input. It is the first in the industry to pass the most stringent 4kV fast burst test (for communication and power supply) and 8kV electrostatic anti-interference test in Guangzhou Saibao Certification Center. It can be directly installed in the electrical cabinet with high-power equipment and is suitable for use in harsh electromagnetic environment.

2: GPRS and SMS dual communication guarantee are the first in the industry to ensure the reliability of monitoring.

3: SMS alarm can send equipment information regularly, so as to ensure that the personnel on duty can always grasp the equipment situation and prevent problems before they happen.

4: if the cell phone signal at the location of the SMS module is low, the SMS module will automatically send a reminder message.

5: The personnel on duty can send short messages on their own initiative to inquire about the current alarm status and computer room information at any time.

6: The first dual-machine hot standby function in the industry. For very demanding occasions, two short message alarms can be used as redundancy. At ordinary times, one short message alarm is in working state and the other is in backup state. If one SMS alarm has no network signal or fails, the other SMS alarm automatically switches from the backup state to the working state to complete the alarm monitoring function.