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Maxon ACC-513E, Техническое руководство

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c. TX Forcing Mode 

During RX mode, when the Radio receives data from the DTE, if 

TX Forcing Mode 

Option is enable, the radio will transmit data. If disabled, the radio will not. 

 

d. Initializing Data for HT (Hyper Terminal) 
This is a strongly recommended option when using Hyper Terminal. In addition, you 
can check the version of the modem. 
 

 
6.3. System Option 2 

 

a. Base Block Size 1 
This option is about the data size to be transmitted at one time. If data flow control 
is selected in Auto mode, radio will try handshaking after a transmission of 

assigned data. you can select the 

Base Block Size1 according to communication 

conditions. Proper value is maximum data size to complete successful transmission 
without any error. Usually, under 128 byte (Default) is recommended. Detailed 
information is given in Section 7.4. 

 

b. Preamble Data Size 
This size of bit is for synchronization of the modem. At least 32 bits (Default) is 
recommended. Detailed information is given in Section 7.4. 

 

c. Wait for Busy Time 
After the radio transmits established data, the radio waits for a response signal. If 
there is no response signal, after this specified time elapses, next data will be 
transmitted, next data will be transmitted on receiving response signal. Normally, 
1000ms (Default) is recommended. 

 

d. Flow Control 
There are three methods to control data. Under Auto Mode, you can select 
Xon/Xoff, RTS/CTS or NONE but in Dumb Mode, this is fixed to NONE. Detailed 
information is given in Section 7.1. 
 

Software : Flow Control is controlled by Xon/Xoff code. 

Hardware : Flow Control is controlled by RTS/CTS of RS-232 
None : Radio does not use any Flow Control. 

 
e. Tx Delay Time 1 
In Auto Mode, to prevent frequent transmission due to irregular data input, this 
option allows for the radio to enter transmission mode after an assigned time. For 
your reference, frequent transmission spends too much time for its preparation 

Содержание ACC-513E

Страница 1: ...ACC 513E ACC 514E GMSK FFSK Modem SD 170E Series Technical Manual Rev 1 0 July 17 2013 Maxon Telecom Co Ltd ...

Страница 2: ...lications 12 5 Operation 13 5 1 Serial interface 13 5 2 Configuring the SD 170E 16 6 Understanding Modem Option 19 6 1 Modem Select 19 6 2 System Option 1 20 6 3 System Option 2 21 6 4 System Option 3 22 7 Modem Operation Explained 23 7 1 Auto Mode 23 7 1 1 Flow Control 23 7 1 2 Software flow control 24 7 1 3 Hardware flow control 24 7 1 4 None No flow control 26 7 2 Dumb Mode 27 7 3 Test Mode 27 ...

Страница 3: ...f Operation Test 30 8 1 Example of using Hyper Terminal 30 9 Pin out chart for ACC 513E 514E 40 9 1 Pin out for ACC 513E 40 9 2 Pin out for ACC 514E 41 10 Product version information 42 10 1 Version information 42 ...

Страница 4: ...red by the audio filter resulting in a broken data transmission To overcome these problems and provide maximum flexibility an FFSK Fast Frequency Shift Keying internal option board modem can be used Our internal modem option boards consist of a Slave MCU Modem IC and extra circuitry These option boards directly communicate with DTE Data Terminal Equipment to send and receive the meaningful data th...

Страница 5: ...low table Number of Data Bit 8 bits Parity None Number of Stop Bit 1 bit Data flow control None Software Xon Xoff Hardware RTS CTS Programmable Tx forcing mode Configures the modem to transmit regardless of squelch state Data Block Packet size Programmable from 16bytes to 8192bytes by multiple of 16bytes increments To provide maximum flexibility the packet doesn t include additional bits for error...

Страница 6: ...llow the RF Baud rate see below table Number of Data Bit 8 bits Parity None Number of Stop Bit 1 bit Data flow control None Software Xon Xoff Hardware RTS CTS Programmable Tx forcing mode Configures the modem to transmit regardless of squelch state Data Block Packet size Programmable from 16bytes to 8192bytes by multiple of 16 bytes increments To provide maximum flexibility packet doesn t include ...

Страница 7: ...in board from being damaged by electrostatic discharge Opening the Upper Cover 1 Unscrew the four mounting screws located on the top cover of the radio 2 Remove the lid Installation of ACC 513E 514E 1 Install the modem by aligning both sets of header pins into the corresponding sockets located on the digital board of the radio Press firmly into place Closing the Upper Cover 1 Align the upper cover...

Страница 8: ...stem Tele command and tele control to from outstations or machinery Automatic irrigation system Job allocation and status reporting Automatic location reporting polling Typical function specific systems may include the following 4 1 Fixed applications 1 Control point to multiple outstation tele control Used for control and exception reporting in water pumping stations and other similar situations ...

Страница 9: ...lude remote control data links such as control of a remote paging transmitter or single direction status reporting or data flow see Figure 4 2 from a gas pipeline monitoring station Figure 4 2 Telemetry Application 3 Multiple remote sites to control irrigation system see Figure 4 3 Figure 4 3 Irrigation equipment control Application ...

Страница 10: ... to and from taxis see Figure 4 4 Figure 4 4 Job allocation and status reporting Application 5 Marine data communications for ports harbors and inland waters allowing GPS navigation information to be relayed from vehicle or vessel to a control point Figure 4 5 Vehicle Vessel Data Application ...

Страница 11: ...In some systems where data is required to be inputted to a SCADA system or simple PC logger the most useful receiver output will be the RS 232 serial stream Any system using serial data output will also require DTE Data Terminal Equipment such as a PC or workstation driver package or PDA to display the data and upload it into a host process So To interface with these external equipment the SD 170E...

Страница 12: ...erial data IN for option modem The Serial data to be transmitted is input to this pin It s only available when option modem board is installed Inputted data are modulated by modem IC and then injected to MOD It uses asynchronous data format RS 232 level I P 11 Serial data Out for option modem The recovered asynchronous serial data output from the receiver It s only available when option modem boar...

Страница 13: ...n requires additional control such as channel change an additional communication port is needed to control the radio through serial command Figure 5 1 shows an interface cable for data communication and its inner connection In the connection red lines pins 3 6 and 12 on the SD 170E are the minimum required connection to transmit and receive RS 232 data and blue lines pins 4 10 and 11 on the SD 170...

Страница 14: ...ter MCU of the SD 170E will get RF stage to prepare for a transmission In this case proper timing is required to stabilize the RF stage ex PLL lock time Power up time and etc To prevent data loss inputted data will be saved in the internal memory called a buffer in the slave MCU of the modem option board by the completion of the RF stabilization The model contains tunable value for this period of ...

Страница 15: ...eceiving data the Modem IC or receiver should be synchronized by a transmitted preamble sequence To prevent synchronization by unwanted signal a time delay called Rx On Delay is needed between squelch open the point of busy detection and data signaling path to Modem see Figure 5 3 If insufficient preamble code is released from another radio data loss will occur by missing synchronization So a mini...

Страница 16: ...SYSTEM OPTION 1 2 and 3 In MODEM SELECT the type of modem and modem speed for channel space are selectable and in SYSTEM OPTION1 transmission mode of radio and functions of forcing TX and initializing Hyper Terminal are chosen In SYSTEM OPTION 2 options for R TX data format and its processing is selectable In SYSTEM OPTION3 On OFF delay time for R TX is inputted ...

Страница 17: ...io will be automatically controlled by existence of inputted data from a DTE There is no need for the user to be concerned with operation of the radio The SD 170E will transmit simply by sending data b Dumb Mode The Radio should be controlled by user application manually For instance to transmit data you should input PTT RTS signal besides assigned data Moreover in control of the radio exact timin...

Страница 18: ...e of bit is for synchronization of the modem At least 32 bits Default is recommended Detailed information is given in Section 7 4 c Wait for Busy Time After the radio transmits established data the radio waits for a response signal If there is no response signal after this specified time elapses next data will be transmitted next data will be transmitted on receiving response signal Normally 1000m...

Страница 19: ...t is recommended Detailed information is given in Section 5 2 b Tx On Delay Radio transmits data after elapsing this period of time since TX starts In case of the SD 170E series 20ms Default is recommended Detailed information is given in Section 5 2 c Rx On Delay The radio enters RX status after elapsing this period of time since receiving the carrier In case of the SD 170E series 16ms Default is...

Страница 20: ... transmit buffer does not overflow This operating mode supports software hardware and none flow control and pin connections are changed according to the type of flow control used The detailed instruction for flow control is the following 7 1 1 Flow Control The buffers in the radio modem and its flow control function permit serial communications even if the speed differs between the computer DTE an...

Страница 21: ...CE sends command of transmission halt request which is XOFF code to the DTE When the buffer1 have room to receive data again the DCE sends command of transmission request which is XON code to the DTE Figure 7 1 Data and Control signal flow in Software flow control Pin connection Configuration of pin connecting for software flow control is shown below Figure 7 2 Pin configuration for software flow ...

Страница 22: ...ives a CTS signal from the DCE the DTE transmits data When the DCE is receiving data from the DTE to prevent received data from exceeding the buffer capacity in the DCE the DCE sends command of transmission halt request that is the CTS signal to the DTE When the buffers have room to receive data again The DCE sends command of transmission request which is the CTS signal to the DTE Figure 7 3 Data ...

Страница 23: ...ween the modem and the DTE can be turned off altogether With flow control disabled inputted data from the DTE will be continuously transmitted but there is no protection offered by the modem to prevent its internal buffers from overflowing If an overflow occurs within the modem serial data is lost and the data transfer becomes corrupted Transmission of limited data that has less size than availabl...

Страница 24: ... like in hardware flow control and jumper position of CON407 If the DTE has data to transmit the DTE applies a 2 5V high to the PTT RTS line on pin 4 of the DB 15 connector which will cause the radio disable the receive circuits and switch the transmitter on and then release data to radio This size of data to be released should be limited under size of the buffer memory of the slave MCU After all ...

Страница 25: ...e radio transmits data as much as assigned data block size if receiving radio receives this data the radio transmits an Ack signal as indication of successful receipt sequentially next data will be transmitted But if an incorrect receipt happens an Ack signal will not be sent In this case the transmitting radio sends next data after elapsing a given period of time Under this process flow control o...

Страница 26: ...ta is 3 bits and is selectable in the ACC 916E programming software The size of Data is optional in the ACC 916E programming software End data is the last bits of valid data and if no data is detected during a 16 bits interval the modem terminates to receive valid data Figure 7 8 Data block for transmission 8 Example of Operation Test In this section to help you understand the operation of the rad...

Страница 27: ...c Select Com Port1 Click on OK d Select the detail of Com1 port 9600bps 8 bits of Data bits None of Parity one bit for Stop bits and Xon Xoff for Flow control and then click the OK button ...

Страница 28: ...e Main window appears click Icon inside red circle f Click the Settings tab button ...

Страница 29: ...g Click the ASCII Setup button h Check Send line ends with line feeds and Echo typed characters locally ...

Страница 30: ...and click the OK button i By clicking the OK button the software escape from the properties window j If the following main window will be displayed basic setting up is completed ...

Страница 31: ...8 1 2 Test examples a Text character communication Type any types of character with keyboard and transmitted text will be displayed in receiving main window ...

Страница 32: ...Send Text File Select a text file of about 2K bytes Click the Open and the text file will be transmitted If there is no text file you can make one For your reference you can determine the size of text file because the text file is only for test ...

Страница 33: ... The received text file data is displayed in the main window like the following c Any types of data file except text file communication Select Transfer Send Text File ...

Страница 34: ... Determine receiving path and select Zmodem of receiving protocol and then click the Close button to return to the main window Select Transfer Send Text File ...

Страница 35: ... Determine transmitting file and select Zmodem of protocol and then click the Send button The following pop up box appears and state of the file transmission is displayed ...

Страница 36: ... In receiving side the following pop up box appears and state of file reception is displayed If transmission and reception of file have finished each pop up box is automatically closed ...

Страница 37: ...9 Pin out chart for ACC 513E 514E 9 1 Pin out for ACC 513E ...

Страница 38: ...on The modem contains a modem firmware version string Copyright 2003 2004 Maxon Telecom CO LTD Version 1 1 After item of initializing data for HT of modem option in ACC 916E is enabled if the radio is turned on information of the modem version is transmitted through the TXD line ...

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