YOKOGAWA YS100 series instrument

YOKOGAWA YS100 series instrument

Product Overview

（1） Product positioning and core applications

The YS100 series instruments are industrial grade control and monitoring equipment launched by Yokogawa Electric, covering multiple models such as multifunctional controllers, programmable controllers, alarm indicators, and automatic/manual operation stations, with core adaptability to industrial process control scenarios. As a key extension option, its communication function supports two mainstream communication methods: RS-485 communication (option code/A31) is used to build a distributed monitoring network with monitoring computers (such as PCs), and DCS-LCS communication (option code/A32) is used to access the Yokogawa CENTUM-XL/μ XL distributed control system, realizing equipment status monitoring, parameter configuration, and remote operation, providing stable and flexible human-machine interaction and system linkage solutions for industrial automation.

（2） Applicable models and document basic information

Applicable models for communication function

Communication option code supports model but not supports model

/A31 (RS-485 communication) YS150, YS170, YS131, YS135, YS136 None

/A32 (DCS-LCS communication) YS150, YS170, YS135, YS136 YS131 (with alarm indicator)

（3） Overview of Startup Process

The communication function activation of YS100 series instruments needs to follow standardized procedures, and the core steps include:

Open the box and check the product specifications and communication option configuration (confirm if A31 or A32 options are pre installed);

Complete equipment installation and communication wiring (wiring according to RS-485 or DCS-LCS requirements);

Connect the power supply and enter engineering mode to configure communication parameters (address, baud rate, etc.);

Load control program (programmable model such as YS170) or directly perform communication function testing;

After verifying the stability of the communication link and confirming that data reading, writing, and remote operations are normal, enter the normal operating state.

Core communication specifications

（1） RS-485 Communication Specification (Option Code/A31)

1. Interface and protocol parameters

Communication interface: RS-485 five signal interface, including SD (A) (sending data A), SD (B) (sending data B), RD (A) (receiving data A), RD (B) (receiving data B), SG (signal ground);

Communication protocol: no protocol (command response message format), asynchronous transmission mode;

Transmission parameters: baud rate supports four adjustable levels of 1200/2400/4800/9600bps; Stop position 1 or 2; Parity check supports no check (NO), odd check (ODD), and even check (EVENT);

Data format: ASCII 8-bit encoding, single block text structure, maximum length of a single message is 220 bytes (including CR carriage return and LF line break);

Transmission characteristics: Half duplex communication, bit transmission order is the least significant bit first; The character interval timer is 0.1 seconds, and if it expires, it is judged as a communication error;

Error detection: Supports vertical parity check (even/odd/none), can identify frame errors, parity errors, overflow errors, etc.

2. Connection capability and physical characteristics

Connection method: 1: n multi station connection, a single RS-485 port can connect up to 16 YS100 series instruments, and each instrument needs to be assigned a unique address (1-16);

Communication distance: maximum transmission distance of 1200m (using recommended cables);

Recommended cable: shielded twisted pair, wire diameter 0.5~1.25mm ² (AWG No.20~AWG No.16), such as Hitachi wire CO-SPEV-SB (A) 3Px0.5PQ;

Terminal resistor: A terminal resistor of 120 Ω± 1%, 1/2W, 100ppm/℃ must be connected at both ends of the communication cable. The receiving side is controlled by the JP1 jumper on the RS-485 communication board (ON is enabled, OFF is disabled), and an additional resistor needs to be installed on the instrument panel for the four wire transmission side.

（2） DCS-LCS Communication Specification (Option Code/A32)

1. Adaptation system and connection parameters

Adaptation system: Yokogawa distributed control system CENTUM-XL, μ XL;

Communication link: Connected to DCS field control unit (such as MFCU of μ XL) through LCS loop communication card;

Connection capability: A single LCS card can support up to 8 YS100 instruments, and a single MFCU can install up to 3 LCS cards, so a single MFCU can connect up to 24 instruments; A single EFCS on-site control station can connect up to 120 instruments;

Wiring requirements: KS4 cable (maximum transmission distance of 100m), communication cable using shielded SCCD twisted pair;

Core feature: YS100 instrument is registered as an internal instrument of DCS, supporting monitoring and operation through DCS operator station without additional programming. Monitoring functions can be assigned through standard FIF (Fill In Forms) method.

2. Corresponding relationship between DCS instrument models

YS100 series models, DCS internal instrument models, core monitoring permissions

YS150 (Multi functional Controller) SLPC supports PV/SV/MV read-write, PID parameter configuration, and alarm status monitoring