Yokogawa DL350 Scope Order Communication Interface



Yokogawa DL350 Scope Order Communication Interface

Overview

This document is the Yokogawa DL350 Scope Order Communication Interface User Manual (6th edition, released in April 2024), which focuses on the Ethernet and USB communication interface functions of the device. It provides detailed guidance for users to complete interface configuration, remote control programming, and status monitoring. At the same time, it provides a supporting document system, technical support channels, and version revision records to ensure that users can safely and efficiently operate the device remotely through the communication interface.

Safety regulations and symbol explanations

（1） Warning symbols and their meanings

The manual adopts a three-level warning system and provides French reference to ensure clear safety guidance in multilingual scenarios

Warning: Operations that may cause serious or fatal injuries, such as operating high-voltage circuits without grounding, using equipment in flammable environments, etc., must strictly follow preventive measures.

CAUTION: Indicates operations that may cause minor injury or equipment/data damage, such as wet hand operation interfaces, improper cable connections, etc.

Note: Key information indicating the correct operation of the device, such as communication interfaces that cannot be used simultaneously, command execution sequence requirements, etc.

Equipment symbol: The "manual reference required" symbol marked on the equipment indicates that the operation needs to refer to the manual for special guidance to avoid missing key steps.

（2） Core Security Guidelines

Scope of use: The communication interface is only used to connect with a PC for remote control, and it is strictly prohibited to use it beyond the designated range; The equipment complies with measurement category II of IEC 61010-031 standard and cannot be used in category III/IV scenarios. When paired with equipment of different categories, the lower category shall prevail.

Grounding requirements: The oscilloscope protection grounding terminal must be reliably grounded, and the probe grounding wire must be connected to the grounding potential. Double grounding can effectively prevent the risk of electric shock.

Environmental restrictions: The working environment must meet the temperature range of 0-50 ℃, humidity range of 20% -80% RH (non condensing), and storage environment temperature range of -40~71 ℃; It is strictly prohibited to use in damp, dusty, flammable/explosive gas environments. The working altitude should not exceed 2000m, and the storage altitude should not exceed 15000m.

Equipment status: If any signs of damage such as damaged interface cables or exposed metal are found, immediately stop using and contact the dealer for repair; It is strictly prohibited to disassemble or modify communication interface components. Yokogawa shall not be held responsible for any malfunctions caused by unauthorized modifications.

Communication interface function and configuration

（1） Ethernet interface

1. Core features and parameters

Function: Supports remote reception of device setting instructions, acquisition of measurement data (such as waveform data, panel configuration) and status information (such as device error codes, operating status), and remote transmission of measurement results and status bytes.

Technical specifications: 1 RJ-45 port, compliant with IEEE 802.3 standard, maximum data rate of 100Mbps, communication protocol is TCP/IP; The transmission rate of waveform data varies depending on the data format. For example, the transmission of byte data for 1 million data points takes about 100ms, while ASCII data takes about 30s.

2. Connection and configuration

Hardware connection: Use shielded twisted pair (STP) to connect the Ethernet port on the left panel of the device to the hub/router, and then connect to the PC; direct cables are required, and it is not recommended to directly connect the PC to the device through crossover cables.

Parameter settings: TCP/IP parameters (IP address, subnet mask, default gateway) and network timeout time need to be configured. Set the timeout period through the device menu "Utility>Network>VXI11" to ensure stable communication during remote control.

3. Remote/Local Mode Switching

Switching logic: When the PC sends the "COMMunicate: REMote ON" command, the device enters remote mode, and "Remote" is displayed at the top of the screen. At this time, touch panel/button operations can only trigger the "Release Remote Mode" confirmation pop-up window; Send "COMMunicate: REMote OFF" or click "OK" in the pop-up window to switch back to local mode.

Mode restriction: In remote mode, if the PC sends the ": Communicate: LOCKout ON" command, the local operation will be locked and can only be released through the PC command; When switching between two modes, the current device settings will be retained without the need for reconfiguration.

（2） USB interface

1. Core features and parameters

Function: Consistent with Ethernet interface function, supports remote command reception, data transmission, and status monitoring, but requires additional driver installation.

Technical specifications: 1 Mini Type B port, compliant with USB 2.0 standard, device in self powered mode; Only supports Windows 8.1/10/11 system PC, requires installation of Yokogawa USB driver (YKMUSB) and communication library (TMCTL); The waveform transmission rate is slightly higher than Ethernet, with a byte data transmission time of about 700ms for 1 million data points and about 25s for ASCII data.

2. Connection and configuration

Hardware connection: Use a USB Mini B cable to connect the USB port on the left panel of the device to the PC. If multiple devices are connected through a USB hub, connect the DL350 to the hub port near the PC to avoid signal attenuation; Do not plug or unplug USB cables within 20-30 seconds after the device is turned on (not fully started) to prevent damage to the device.

Parameter setting: Set "USB Function" to "TMC" through the device menu "Utility>System>Others". After setting, restart the device to take effect; PC requires the installation of corresponding drivers, which can be obtained through the official website or by contacting distributors. The use of third-party USB drivers is prohibited.

3. Remote/Local Mode Switching

Switching logic: Completely consistent with the Ethernet interface, confirm the switch through PC commands or local pop ups, and retain the current settings when switching modes.

Exclusive restriction: Ethernet and USB interfaces cannot be used simultaneously. When one interface is enabled, the other interface will be automatically disabled.

Fundamentals of Programming and Instruction System

（1） Core Programming Concepts

1. Message format

Program message: sent from a PC to a device, containing one or more instruction units separated by semicolons, and ending with a termination symbol (NL, ^ END, or NL ^ END); Each instruction unit consists of "program header+space+program data", such as "ACQuire: MODE NORMal" (set the acquisition mode to normal mode).

Response message: returned by the device to the PC, corresponding to the query instruction in the program message, in the format of "response header+space+response data" (some queries only return data), terminated with NL ^ END at the end; If the program message contains multiple queries, the response will be returned in the order of the queries.

2. Data type

Supporting multiple data formats to adapt to different control requirements, the key types and descriptions are as follows:

Example of Data Type Format Explanation

Decimal numbers (<Decimal>) consist of integers (NR1), fixed-point numbers (NR2), and floating-point numbers (NR3). The device can receive any format, and the response is uniformly set to NR3 with a sampling rate of "TIMebase: SRATE 1E6"

Physical quantities (such as<Voltage>/<Time>) are numerical values prefixed with units or multiples, and units/prefixes are not case sensitive. Set the timeline as "TIMebase: TDIV 1US"

Register>supports decimal, hexadecimal (# H), octal (# Q), and binary (# B), and responds by uniformly setting events in decimal: "STATus: EESE # H01"

Pre defined mnemonic for character data (<Character data>), to be selected from options, case insensitive setting coupling method: "CHANnel1: COUPling AC"

Boolean value (<Boolean>) supports ON/OFF or numerical values (0=OFF, non-zero=ON), and the response uniformly uses 0/1 to open the channel display: "CHANnel1: DISPlay ON"

The string (<String data>) needs to be enclosed in single/double quotation marks. If it contains quotation marks, two consecutive setting labels should be entered: "CHANnel1: LABel" CH1_TEST "

Block data (<Block data>) 8-bit binary data, formatted as "# N+N bit data length+data byte sequence", only used to respond to waveform data response: "# 800000010ABCDEFGHIJ"

（2） Instruction system

The manual divides instructions into 37 command groups, covering full remote control functions such as device acquisition, analysis, display, and triggering. The core command groups and functions are as follows:

Command Group Core Instruction Function Description

ACQuire Group: ACQuire: MODE, ACQuire: LENGTH Set/query waveform acquisition mode (normal/average/envelope), recording length (oscilloscope mode)

ANALysis Group :ANALysis:HARMonic:FREQuency、:ANALysis:HARMonic:RESult? Configure harmonic analysis frequency, query harmonic RMS/power analysis results (such as total distortion rate, active power)

CHANnel Group: CHANnel<x>: COUPling, CHANnel<x>: SCALe sets channel input coupling (AC/DC/GND), screen display upper and lower limits, supports voltage, temperature, strain and other modules

TRIGger Group: TRIGger: MODE, TRIGger: LEVel Configure trigger mode (single/repeated), trigger level, supports multiple trigger types such as edge, pulse width, etc

WAVeform Group :WAVeform:SEND? 、 WAVeform: FORMat queries waveform data and sets data transmission format (byte/word/ASCII)

SYSTem Group :SYSTem:CLOCk:DATE、:SYSTem:BATTery:REMain? Set device date and time, check battery remaining level

Common Command Group *IDN? 、 *CLS, OPC standard IEEE 488.2 command, query device model, clear status register, mark operation completed

Status monitoring and troubleshooting

（1） Status reporting mechanism

The device achieves status monitoring through status bytes, registers, and queues. The core components include:

Status byte: 8-bit binary data, reflecting the overall operating status of the device, such as bit0 indicating operation completion and bit5 indicating error occurrence.

Standard event register: records device standard events (such as operation completion, query errors), which can be enabled through "* ESE" and queried and cleared through "* ESR?".

Extended event register: records device specific events (such as collection completion, trigger occurrence), enabled through the "STATus: EESE" setting, cleared through the "STATus: EESR?" query.

Output and Error Queue: The error queue stores the latest error code and description, which can be queried through "STATus: ERRor?"; The output queue stores non error messages, which can be set to be stored or not through ": STATus: QENable".

（2） Common problem solving

Troubleshooting steps for problem types and phenomena

Communication connection issue: Ethernet/USB cannot establish a connection. 1. Check if the cable connection is secure, and confirm if the Ethernet IP address is in the same network segment; 2. USB needs to confirm whether the driver is installed correctly and whether the device's "USB Function" is set to "TMC"; 3. Restart the device and PC and try again

Instruction execution problem: Sending instructions without response or error. 1. Check the instruction syntax (such as case and parameter range), refer to Chapter 4 of the manual to confirm the instruction format; 2. Confirm that the device is in remote mode and there is no local lock; 3. Check the communication timeout setting. If the data volume is large, the timeout time can be extended

Data transmission issue: waveform data transmission interruption or distortion. 1. Confirm that the transmitted data format is consistent with the supported format of the device (such as byte/word/ASCII); 2. Ethernet needs to check network bandwidth to avoid transmitting large amounts of data simultaneously; 3. USB requires the use of short distance cables to reduce signal attenuation