21 Model 4S2VR-V720-KR11 vs Model 4S2VR-V720-D13P02ST Y 70 60 Y 50 40 30 X 20 10 -70 -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 (mm) Model 4S2VR-V720-KR11 X vs Model 4S2VR-V720-D13P06ST Y 70 60 50 Y 40 30 X 20 10 -70 -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 (mm) X
2 3-3 Communication Time Transmission time and TAT (Turn Around Time) is displayed below as the communication time. Command Command 4S2VR-V720-KR11 HOST Tag Response Response Response Command HOST Command 2 Response KR11 Tag Tag RF interface Transmission time TAT TAT is the sum of (host communication time + RF interface communication time + processing time of controller).
23 Chapter 4 Functions 4-1 Procedure of Communication and Outline of Operation Command HOST KR11 V720 series tag Response When the host issues a command to Model 4S2VR-V720-KR11 , Model 4S2VR-V720-KR11 communicates with the tag according to the command and returns a response to the host.
24 4-2 Memory Map of Tag Kanban reader Model 4S2VR-V720-KR11 can have access to banks O - F, 16 pages per bank, and 4 bytes per page. Each tag has a user memory area of 4 bytes per page, and 112 byte for 28 pages as shown in the memory map below. A user can use all the area freely for reading and writing for each page. When an area out of the memory for the tag is accessed, the tag absence error occurs.
25 4-3 Specification of Access Page As described in the previous section, the communication between Model 4S2VR-V720-KR11 and the tag is executed by access for each page. The commands of Read, Write, Same Data Write and Write Protect are executed by specifying applicable pages. • Since more than one bank cannot be specified at a time, the area accessible at a time is limited to 16 pages or less in the same bank. • To specify a bank, the bank number is specified by the 2 digit hex number ((00) h - (OF) h).
26 4-4 Specification of Communication Mode A communication mode optimum for object motion according to the intended application is selected. The specification of the communication mode is represented by ASCII digits. Transmission operation No. Description Trigger ‘0’ When the host puts object movement under control, a command is issued after ensuring that the tag is present before Model 4S2VR-V720-KR11 .
27 4-5 Types of Commands Communication command Communication control command A command is specified by 2 digits ASCII. * Command name Code Description Test ‘10’ Returns the received data to the host as it is. Stop ‘13’ Cancels the command under execution. Read ‘31’ Tag data is read for each page. Write ‘32’ Data is written on the tag for each page. (Verify After Write) Same Data Write ‘35’ Same data is written on the tag for each page. Data for one page can be written.
28 4-6 Status (1) Command satus This is a message given from the host to the reader. It is used to modify a reply for communication or the whole command. It is represented by 8 bits (1 byte), each bit having its own meaning. D7 D6 D5 Name Verify ACK STM D4 ATM D3 D2 D1 D0 NGU OKU EXT Description The host requests a response to the reader. The host acknowledges the acceptance to the reader. Switches the communication mode with the host. 0: Realtime mode Requests a prompt reply to a command.
29 4-7 Exit Code When an error occurs in RF interface communication When an error occurs in communication with the host. The exit code is sent by the reader as a reply to the host, which is represented by 2 digits ASCII, showing the status of the reader as the result of execution of the command.
30 Chapter 5 Communication Frame 5-1 Overview of Communication Frame 3 ＠ ADR 2 Status Command Header field 1 A/H 1 Communication Mode 6 1 Page Specification (Parameter) ············· CR Terminator Data field The frame format is comprised of the header field of 3 bytes starting by @, the data field represented by ASCII characters and the terminator (ASCII code (0D) h).
31 5-2 Command format (When the communication mode with the host is the realtime mode) Note) In the following description, (**) h is represented in the hexadecimal notation while '**' included in quotation marks is represented in ASCII notation. As a rule, ASCII codes are transmitted for all serial communication data. However, a hex code of 1 byte should be transmitted for the Status data alone. 1. Test This is a command for conducting a test of host communications. sends the same data to the host.
32 3. Read This command is used to read data from the tag. Data in a desired page can be read. Command The tag data on the page specified in the Page Specification box is read in the specified communication mode. Header @ ADR Command Status A/H Communication Mode Bank Specification Page Specification ‘31’ Terminator CR ADR represents the address number expressed by '30-39' and '41-46' in ASCII converted from the hexadecimal 0-F. Send (00) h for the Status in 1:1 communication in general.
33 All the information included in ' The mark * represents (00) h. ' is ASCII codes except the mark *. Response in abnormal state Header @ ADR Exit Code Status ‘XX’ Terminator CR The exit code is represented by 2 digits (1 byte) in ASCII as defined in 4-7. Judgment notify command Based on the result of the read data, the host can notify the RF interface of the result of judgment in checking, etc. Terminator Header @ ADR Status CR The Status of (44) h sends OK.
34 The table below shows the user memory of the tag when the following commands are executed. Page Byte 0 Byte 1 Byte 2 Byte 3 0 30h 31h 32h 33h 1 34h 35h 36h 37h 2 38h 39h 30h 30h 3 40h 41h 42h 43h 4 44h 45h 46h 47h 5 48h 49h 4Ah 4Bh 6 4Ch 4Dh 4Eh 4Fh 7 50h 51h 52h 53h 8 52h 46h 49h 44h 9 58h 59h 5Ah 61h 10 56h 37h 32h 30h * In case that ‘RFID’ is written on page 8 and ‘V720’ on page 10 in ASCII codes in the continue mode.
35 5. Same Data Write This command is used to write the same data on the tag for each page. It is convenient for clearing all the memory area of the tag. The maximum pages that can be specified for writing at a time are restricted to one bank and pages across more than one bank cannot be specified. Since this command also performs the verify read operation, there is no need to execute the verify read operation again.
36 Response ‘@0* 00’ 6. Tag write Protect Set This command is used to set write protect on the tag. The maximum pages that can be specified for write protect at a time are restricted to one bank and pages across more than one bank cannot be specified for write protect. Command Pages for which write protect is specified in the data field are sent. Writing is disabled on the specified pages.
37 5-3 Command format (When the communication mode with the host is the polling mode) a) The stop, write, same data write, and tag write protect commands are always in the realtime mode. b) Read Command A Specifies the bank and page to be read. Commu- Command Header A/H nication Mode @ ADR Status Bank Specification Page Specification ‘31’ Terminator CR ADR represents the address number expressed by '30-39' and '41-46' in ASCII converted from the hexadecimal 0-F.
38 Chapter 6 Cautions in Operation 6-1 Effects of Metal on The Back Face upon Communication Area of Reader Size of metal on the back face (For reference) If metal is present on the back face of the R/W module, the communication distance with the tag is reduced. Ｘ Ｙ Communication distance decreasing rate (%) 交信 Communication Metal plate Distance to the metal on the back Measurement condition Metal on the back (aluminium) 300 × 300 × t1.
39 6-2 Effects of Supply Voltage on Communication Area of Reader (For reference) Effects of Supply Voltage (For reference) The communication distance (read & write) of the R/W module varies according to the value of the supply voltage. Refer the values listed in the table below for proper operation. The changing rate of the communication distance is defined with the distance at the supply voltage of 5V set as 100%. Tag type Changing rate of communication distance 5.0V 5.5V 4.
40 6-3 Cautions in handling of tag 1. The tag is not provided with a rigidly protected construction. If it is bend or subjected to external pressure, its internal circuit could be damaged, thereby resulting in communication failure. The system should be designed so as to have a recovery function in case of a possible damage of the tag. 2. The communication distance may vary depending on objects lying between the reader and tag. 3. The communication area may vary according to the types of tags.
41 6-4 Mutual Interference When a number of R/W modules are used in proximity, allow the spacing as shown below between them in order to prevent a malfunction due to mutual interference. z In case that antennas are disposed in parallel.
42 6-5 Specifications of Tags General specifications Memory capacity Memory type Operating frequency Data retention time Number of data re-writable times 112 bytes (User area) 128 bytes EEP-ROM 13.
43 6-6 Warranty Warranty 1. Warranty period The warranty shall apply for one (1) year after the delivery of the product to the designated delivery point. 2. Scope of warranty A defect incurred for a cause attributable to a fault of Omron during the warranty period shall be repaired or replaced free of charge, for the defective parts of the product at the place of purchase or delivery.
44 6-6 Notice 1. FCC WARNING Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. 2. NOTICE This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
