TOHO ELECTRONICS INC.
Thank you very much for purchasing a TTM-10L Series (with communications). Please read this operation manual carefully and use this product correctly. Contents 1. Before using the product...................................................................................................... 3 1.1 On this operation manual 1.2 Conditions for communications 1.3 What can be done with communications 1.4 Positioning communications (priority ranking) 1.5 Setting before communications 2.
1. Before using the product 1.1 On this operation manual This is an operation manual regarding communications with a TTM-10L Series (hereinafter referred to as "this product"). 1.2 Conditions for communications The communications function of this product is optionally specified. For that reason, you should specify a communications option (RS-485 or RS-232C) in purchasing this product. 1.3 What can be done with communications With this product, users can write and read items specified in "7.
2. Settings regarding communications 2.1 Overview Before communications is performed, initial settings must be made on this product. Enter such settings with the keys on the front panel. (No change can be made during communications.) Power-on Initial screen Displayed for 4 seconds upon the power-on. In 4 seconds from the power-on, the screen automatically opens. Mode screen Measured value The parameter screen opens by pressing the MODE key for 2 seconds or longer.
2.3 Setting a data length 2.4 Setting a stop bit length 2.5 Setting a parity 2.6 Setting whether to conduct a BCC check Operate the ▲ and ▼ keys to make the settings. The initial value is H H H H. ˜¿¢p p: Stop bit length F Stop bit 1 I Stop bit 2 ¢: Parity c No parity f Odd parity D Even parity ¿: Data length N Data length, 7 bits E Data length, 8 bits ˜: BCC check c BCC check disabled j BCC check enabled 2.7 Setting a communications speed Operate the ▲ and ▼ keys to make the settings.
3. Communications control 3.1 Communications procedure This product returns a "response message" in response to a "request message" from a high-level computer. It therefore does not initiate a transmission. Transmitted by a highlevel computer High-level computer Transmitted by TTM-10L Transmitted by a highlevel computer Request message Request message Response message This product (TTM-10L) Transmitted by TTM-10L Response message Response delay time 0-250ms 1ms or more See "3.6.
3.3 Composition of a request message (transmitted from a high-level computer to this product) n For codes ① to ⑩, see "3.5 Description of codes." n For specific examples of request messages, see "4.1 Examples of communications to be read" and "4.2 Examples of communications to be written." 3.3.1 Composition of a read request message ＢＣＣ ＥＴＸ □ □ □ Ｒ □ □ ＳＴＸ ⑦ BCC data ⑥ End code ｜ ④ Identifier ｜ ③ Contents of the request: read/write ② Address ① Start code 3.3.
3.4 Composition of a response message (transmitted from this product to a high-level computer) n For codes ① to ⑩, see "3.5 Description of codes." n For specific examples of request messages, see "4.1 Examples of communications to be read" and "4.2 Examples of communications to be written." 3.4.1 Response message in response to a read request message ＢＣＣ ＥＴＸ □ □ □ □ □ □ □ □ ＡＣＫ □ □ ＳＴＸ ⑦ BCC data ⑥ End code ⑤ Numerical data ｜ ④ Identifier ｜ ⑧ Acknowledge code ② Address ① Start code 3.4.
3.5 Description of codes n The codes from ① STX, ② address to ⑩ ERR type as indicated below are expressed in ASCII codes. n For the ASCII codes, see "8. Table of ASCII codes." n For conversion to ASCII codes, see "4. Examples of communications." ① STX This code is needed for the receiver to detect the top of the message. It is affixed to the top of a character string to be sent. ② Address This is the address of the party (this product) with whom a high-level computer communicates.
⑧ ACK It is an acknowledge code. If a message received by this product is error-free, this code will be incorporated in the "response message" from this product and returned. ⑨ NAK It is a negative acknowledge code. If a "request message" received by this product is error-ridden, this code will be incorporated in the "response message" from this product and returned.
3.6 Communications precautions 3.6.1 Communications timing Set a sufficient response delay time to make sure that this product is switched over from transmission to reception with regard to a high-level computer in using RS-232C and RS-485. See the figure in "3.1 Communications procedure" and "2.9 Setting a response delay time." 3.6.
3.6.8 Storing data other than a store request message Store all parameters in the EEPROM in either of the three cases described below, even if no store request message is received. 1) If a parameter is changed by key operation in the communications mode 2) If auto-tuning is started and stopped normally in the communications mode 3) If the communications mode is switched to the local mode 3.6.
4. Examples of communications 4.1 Examples of communications to be read Example: Request message: This requests this product set at address 27 to read the PV. (High-level computer) In response to that, Response message: This returns PV data (00777).
4.2 Examples of communications to be written Example: Request message: This requests this product set at address 03 to set "the A1F setting to (High-level computer) 135" (write 135). (Set the event 1 function to the following: Error alarm type to be PV error alarm 1, alarm type to be deviation lower limit alarm 3 and additional function to be alarm hold + standby sequence (5).) In response to that, Response message: This returns a notice that the request message has been received.
5. Specifications 5.1 Communications standard category Compliant with RS-485 and RS-232C 5.
6. Connections 6.1 Connecting TTM-10L in RS-485 High-level computers (parent stations) TTM-10L (child stations) TTM-10L (child stations) TTM-10L (child stations) Install an end of line resistor at both of the farthest devices in the parent station and the mobile unit. For a resistance value, use one that matches the characteristic impedance of the cable. Provided that the synthesis is set to at least 75Ω. 6.
7. Table of identifiers (codes) ¢ For the setting range, selection items, initial values, etc., see "Operation Manual- Standard Version" separately attached. a) Character number or symbol in the operation flow described in "Operation Manual - Standard Version" (separate volume) é b) Identifier: This code represents an item. Enter this code in the identifier field in the message. The □ in the frame represents an SP (ASCII code: 20H). c) Character: The character to be displayed on the screen of this product.
a) Identifier 13 A1F Name Character R/W EV function R/W Description R/W the EV function *7 0 0 0 0 0 Additional function PV event output PV error event output Additional function 0: None 1: Event output hold 2: Standby sequence 3: Event output + standby sequence PV event output 0: None 1: Deviation upper/lower limit event output 2: Deviation upper limit event output 3: Deviation lower limit event output 4: Deviation upper/lower limit range event output 5.
8. Table of ASCII codes ASCII code 02H 03H 06H 15H Use symbols STX ETX ACK NAK ASCII code 30H 31H 32H 33H 34H 35H 36H 37H 38H 39H Use numerical characters 0 1 2 3 4 5 6 7 8 9 2DH 20H − Minus SP Space ASCII code 41H 42H 43H 44H 45H 46H 47H 48H 49H 4AH Use characters A B C D E F G H I J 4BH 4CH 4DH 4EH 4FH 50H 51H 52H 53H 55H K L M N O P Q R S T 55H 56H 57H 58H 59H 5AH 20H U V W X Y Z SP Space TOHO ELECTRONICS INC.
