Module Communications, Modbus Communication

IRIS MODEL P522 APPLICATION MANUAL

The BASIC BURNER START CIRCUIT shown in Figure 12 is a basic circuit requiring only two pieces of external hardware for each burner:

1.Master Relay with at least two nor- mally-open contacts rated for load.

2.DADE Timer, with two instant close/ timeout open contacts.

* * *

1.Bryant, Design of Fail-Safe Control Systems, Power, January, 1976.

2.Bryant, Is Your Plant’s Control Sys- tem Safe?, Power, August, 1979.

3Fischer, Are PLCs Suitable for Emer- gency Shut-Down Systems?, Presented at 43rd symposium for the process in- dustries, Texas A & M University, 1988.

MODULE COMMUNICATIONS

The P522 communicates with any host computer that has an RS-232 serial I/O port and supports ASCII character code transmission at 4800 baud (or, in cur- rent revisions of the processor chip, at 4800 or 9600 baud). The baud rate is displayed with the module address in the current versions (see SETTING AD- DRESSES, section). The data transmitted to and from the P522 is over two twisted pairs that are dif- ferentially driven and received according to the RS- 422 standard. The differential mode allows long wire runs in harsh, electrical environments.

MODBUS COMMUNICATION

Modbus Communication for IRIS P522 Flame Moni- toring System Signal Processor.

Introduction

Modbus Communication protocol allows the P522 to communicate with any process controllers or hu- man-interface host computers that support this pro- tocol. The P522 processor status and settings are organized as 23 4X holding registers and five 0X

discrete registers. For more information on Modbus protocol, please refer to Modicon’s Modbus Proto- col Reference Guide (PI-MBUS-300 Rev E).

Communication Setting

P522 can communicate only in Modbus RTU mode, with the following configuration:

·9600 baud

·8 data bits

·no parity

·1 stop bit

The factory default of a P520/P522 station number is 0. It is important to change the station number so that there is no duplicate stations. To change or check the station number:

·Press and hold Reset button for 4 seconds.

·The 4 LED digits will show the baud rate and the station number. The 2 leftmost digits are the baud rate (96 or 48); the 2 rightmost digits are station number from (0 to 63).

·Press up/down button to change the station number.

·Press Store button to save station number.

Protocol Detect

P522 with firmware version 5.0 still supports the existing IRIS protocol. After power-up, processor will listen for both protocols. Once the protocol has been detected, communication must remain in this protocol until the unit is powered off.

MODBUS RTU Function Supported

Four Modbus functions are supported:

·01 Output Coil Read

·03 Holding Register Read

·06 Preset Single Holding Register

·16 Preset Multiple Holding Register

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P522 specifications

The IRIS P522 is a highly advanced smart device characterized by its cutting-edge features, technologies, and remarkable performance capabilities. Designed for seamless integration into both personal and professional environments, the P522 stands out as a versatile tool for various applications, ranging from productivity enhancement to entertainment.

One of the main features of the IRIS P522 is its state-of-the-art display technology. The device sports a high-resolution touchscreen that provides vibrant colors and sharp images, ensuring a remarkable visual experience. This impressive display is paired with an ultra-responsive multi-touch interface, allowing users to interact effortlessly with the device, facilitating increased efficiency in tasks such as data entry, navigation, and media consumption.

The performance of the IRIS P522 is powered by a robust processor and ample RAM, enabling it to handle multitasking with ease. This ensures that users can run multiple applications simultaneously without experiencing lags or slowdowns. Additionally, the device incorporates advanced cooling technologies, which help maintain optimal operating temperatures even during intensive use, ensuring reliability over extended periods.

Connectivity is another significant aspect of the IRIS P522. Equipped with the latest wireless technologies, including Wi-Fi 6 and Bluetooth 5.0, the device allows for lightning-fast data transfer rates and seamless connections to a variety of accessories. This makes it an ideal choice for professionals who require constant communication and quick access to cloud-based resources.

Security features are paramount in today's digital landscape, and the IRIS P522 does not disappoint. It includes biometric authentication options such as fingerprint recognition and facial recognition, providing users with a secure way to access their device and data. This focus on security is further reinforced by regular software updates that ensure protection against the latest threats.

Battery life is another highlight of the IRIS P522, with an energy-efficient design that offers extended usage without frequent recharges. This is particularly beneficial for users on the go, as it enables prolonged productivity without being tethered to a power supply.

In conclusion, the IRIS P522 is a remarkable device that harmoniously blends advanced features, powerful technology, and user-centric design. With its stunning display, high performance, effortless connectivity, robust security measures, and extended battery life, the P522 caters to the needs of users in various contexts, making it an indispensable addition to modern digital life.