96079E RS-232C Communication Unit DL-RS1A User's Manual (GT-70A Edition) Read this manual before using the system in order to achieve maximum performance. Keep this manual in a safe place for future reference.
Introduction This manual provides an overview of the RS-232C communication unit DL-RS1A and describes the functions and procedures of the unit. Be sure to read this manual carefully to ensure safe performance and function of the unit. Keep this manual in a safe place for future reference. Ensure that this manual is passed to the end user. Safety Precautions General Cautions • At startup and during operation, be sure to monitor the functions and performance of the DL-RS1A for proper operations.
Contents T5 (Response send time from DL-RS1A) .................................................................................. 16 T6 (Sensor amplifier settings change time)............................................................................... 16 Safety Precautions General Cautions Handling Errors Operating Precautions Specifications Performance Specifications ........................................................................................... 16 Communication Specifications..............
Before Using the Unit Before Using the Unit (1) Communication setup switches You can use different ON/OFF combinations to configure the communication settings. Checking the Package Contents Setting Switch No. Combination Before using the DL-RS1A, check that the following items are all included. 1 2400bit/s 4800bit/s ON 2 Baud rate ON 1 2 3 9600bit/s* ON 1 2 3 19200bit/s 38400bit/s ON ON 1 2 3 1 2 3 1 2 3 * Factory default positions are shown.
Connecting the Unit to Sensor Amplifiers Before Using the Unit This section describes how to mount a DL-RS1A and connect it to sensor amplifiers. (5) Alarm indicator This indicator lights up in red. For information on the actions you should take when an alarm occurs, refer to "Troubleshooting" (page 17). After turning on the power, the alarm indicator lights for the following amount of time, and communication cannot be performed during this time. No.
Connecting the Unit to Sensor Amplifiers Connecting the Unit to Sensor Amplifiers ■ Connecting the DL-RS1A to DIN rail mount sensor amplifiers Connecting the Unit to Sensor Amplifiers 1 NOTICE Remove the expansion protective cover from the sensor amplifier that you want to connect to the DL-RS1A. You use DL-RS1A by connecting it to sensor amplifiers. The connection method varies according to the mounting type of the sensor amplifiers.
Connecting the Unit to External Devices Connecting the Unit to Sensor Amplifiers ■ Connecting the unit to panel mount sensor amplifiers 1 Connect DL-RS1A to the sensor amplifiers using the optional expansion cable (OP-35361). Communication Terminal Block You can connect external devices such as a PC or PLC to the communication terminal block of DL-RS1A via the communication cables.
Connecting the Unit to External Devices Connecting the Unit to External Devices ■ Connection wiring Sample wiring Refer to the connection wiring diagram shown below when connecting DL-RS1A to an external device such as a PC.
Communication Specifications Commands and Responses This section provides the communication specifications of DL-RS1A and describes how to configure the unit. Overview of Commands and Responses Communication Specifications ID No. 00 01 02 08 09 Main Exp. Exp. Exp. Exp. Command or DRQ input The following table lists the communication specifications for DL-RS1A.
Commands and Responses Commands and Responses ■ Response ■ Error response When DL-RS1A successfully receives a command from the external device, it automatically returns a response based on ASCII codes. For information on the parameters used in the response, refer to "Parameters of Commands and Responses" (page 10). If DL-RS1A could not receive a command from the external device or if the received command included an error, it automatically returns an "error response" based on ASCII codes.
Commands and Responses Commands and Responses Read output states and data from all sensor amplifiers (MS command) Reading Command External devices such as PLC's use the following communication commands to read data from DL-RS1A. Read from the specified sensor amplifier (SR command) Command S R M ID No. , M , Data No. ID No. , , Data No.
Parameters of Commands and Responses Commands and Responses This section describes the parameters used with various commands and responses. Writing ■ Communication commands External devices such as PLC's use the following communication commands to write data to DL-RS1A. Point Attempting to write data with "read-only" attribute results in a communication error and an error response (error number: 22). There are two types of communication commands: read commands and write commands.
Parameters of Commands and Responses Parameters of Commands and Responses ■ Data numbers *4 Specify the data number using three digits (ASCII characters). ● Read-only data The following table lists the types of data that can only be read from GT-70A Series sensor amplifiers. Point Writing read-only data results in a communication error (error number: 22). This data type can only be read when the calculation function is used.
Parameters of Commands and Responses Parameters of Commands and Responses ● Read/write data The following table lists the types of data that can be read from and written to GT-70A Series sensor amplifiers.
Parameters of Commands and Responses Parameters of Commands and Responses ■ Control outputs Error This parameter is used with communication command "MS" and DRQ input. Specify whether the control outputs (HIGH/LOW/GO outputs) are on or off using a one-digit value (ASCII character). Control output 0 1 2 3 4 The following table lists the error numbers that are returned as error responses when errors occur in the communication between DL-RS1A and GT-70A Series sensor amplifiers.
Communication Response Time This section describes the communication response time for each communication command and various time frames. Communication Response Time and Time Chart This section describes the concept of communication response time and the time chart for the communication commands. Communication Response Time ■ DRQ input The data read in response to a DRQ input is the buffered data that DL-RS1A periodically retrieves from the sensor amplifiers.
Communication Response Time Communication Response Time ■ T4 (DL-RS1A command processing time) Time Frames of Communication Response Time This section describes the communication time frames (T2 to T6). Reference The maximum time required is shown for each time frame. However, depending on the actual environment, it may require more time. The processing time varies according to the command sent from the external device.
Specifications Communication Response Time ■ T5 (Response send time from DL-RS1A) The time required to send a response varies depending on the communication speed, data bit length, and number of bytes. For information on the communication settings, refer to page 2. The response time can be calculated using the following formula: Performance Specifications The following table shows the performance specifications for DL-RS1A.
Troubleshooting Specifications Problem Dimensions 43.8 37.2 (48.2) 22.5 ■ When the unit is mounted on the DIN rail 21.1 35.4 70 Unit：mm 5 51.3 43.8 37.2 ■ When the optional fixture (OP-60412) is used 31.4 15 2-φ3.4 70 Action 22.5 2-(4.4x3.4) Cause Power is not Make sure that the voltage of the power supplied to the supplied. sensor amplifier main unit is 20 to 30 VDC.
ASCII Code Table The following table lists the ASCII codes.
WARRANTY KEYENCE products are strictly factory-inspected. However, in the event of a failure, contact your nearest KEYENCE office with details of the failure. Revision History Date of printing Version February 2010 First edition Revision contents Released for each model. 1. WARRANTY PERIOD The warranty period shall be for one year from the date that the product has been delivered to the location specified by the purchaser. 2.
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