CP1H Modbus RTU RS485 : One of the communication options available for the CP1H PLC series is Modbus RTU over RS485. Here's a brief overview of what this entails:

Type: any module
Identifier: 14
Port 3: RS485, No Polling, 38.4k, N, 8, 1,
Protocol Options:

Data Type = RTU
PLC Address 1

Omron
Type: CP1HXA
Serial Port 2: Mode = Serial Gateway, 38400, 8, 1, N,
Response Time out 250ms

Easy Modbus RTU Master Memory map / command Block information
Fuction destcription
Address
Value Hex
Modbus Slave Address (bits 0-7)
D32300
#0001
Modbus Function Code (bits 0-7)
D32301
#0010
Number of Comm Data bytes
D32302
#0007
Modbus slave register address
D32303
#9c41
Number of Modbus slave registers to write
D32304
#0001
Number of Modbus slave data bytes (bits 8-15)
D32305
#0200
Data to send (D32306 upto D32349)
D32306
#700B

One of the communication options available for the CP1H PLC series is Modbus RTU over RS485. Here's a brief overview of what this entails:

1. Modbus RTU:

   • Modbus RTU is a variant of the Modbus protocol that uses binary representation for communication.
   • It employs a master-slave architecture, where a Modbus master (typically the CP1H PLC) initiates communication with one or more Modbus slave devices.
   • Communication occurs in a request-response manner, with the master sending requests to read or write data to the slave devices, and the slaves responding accordingly.
   • Modbus RTU uses RS485 as the physical layer for communication, providing differential signaling for noise immunity and supporting multi-drop configurations.

2. RS485 Interface:

   • RS485 is a standard for serial communication over long distances and in noisy environments.
   • It supports multi-drop configurations, allowing multiple devices to communicate on the same communication bus.
   • RS485 uses differential signaling, where data is transmitted as voltage differences between two lines (A and B), providing better noise immunity compared to single-ended signaling standards like RS232.
   • The CP1H PLCs typically include RS485 ports for Modbus RTU communication, allowing them to connect to a network of Modbus-compatible devices such as sensors, actuators, displays, and other PLCs.

3. CP1H Compatibility:

   • The CP1H series PLCs from Omron are equipped with communication ports that support various protocols, including Modbus RTU over RS485.
   • These PLCs offer dedicated instructions and configuration settings for implementing Modbus communication, making it relatively straightforward to integrate them into Modbus networks.
   • Users can configure the CP1H PLC as a Modbus master or slave, enabling them to communicate with other Modbus devices and exchange data for control, monitoring, and automation purposes.

Overall, the CP1H Modbus RTU RS485 configuration allows for seamless integration of Omron PLCs into Modbus-based industrial control systems, providing reliable communication for a wide range of applications.