用 S7-200 实现 通信

󰽖󰔩󲫼 S7-200 󱅲󲦄 Modbus 󴗮󰖵? 󴇈󱯢: 󲫼󰏟󴴶󲱘󰕟󲿟󰔴󰧃󰒹󰳼 S7-200 CPU 󰐟󴯈󱓎󳂟󰏔󰏾󳅔󰤩󲱘 Modbus 󰐏󰋉󰒢󴗮󴆃󰇄 󴖭󰏾󰕟󱄤󱰃󰝇󰑢 Modbus 󰡳󳛑󲷕 6 󲱘(󰝭󰒢󳂭󰖱󱣕󱆘󱄬󰰼󰋅󰋈 󰐳󰧃󰒹󰔰󰐎󰝊󰒪󱠔󱬃󱣕󲱘󰡳󳛑󲷕󲱘󰷎󱴀󰦖󱭄󴆒󳕂󲄹󵁸󰋖1, 2, 3, 4, 5, 15 󰩠16 󰇄 󳽕󲈖: 󳽕󰕓󲫼 Modbus 󰤣󴆂󱖙󴹏󰜜󳦋󱕫󱑊󰳼 STEP 7 Micro/Win 󰐁󱅝󳺙󱣛󰒸󱑧 (󱴵󲳂 17470979)󰇄 Modbus 󰐏󳂭󰤣󴆂󰦾󳹿 STEP 7 Micro/Win V4.0 SP5 󰦞󰝊󰒹󰏞󲠜󱴀󱬃󱣕󰇄 󰁸 󰁸 󰁸 󰁸 1. 󲹀󰓊󴆒󳕂 2. 󰦖󱭄󰤍󴜡 3. 󱣛󰒸󱑧󲱘󱄬󰙼󰴄󰴔 4. 󰖱󱣕󱆘󱄬󰰼󰦬󴞣󰓴󴕧 1. 󲹀󰓊󴆒󳕂 󰕟󲿟󰐁󲱘 Modbus 󴗮󴆃󱰃󰳼󰏸󰏾 S7-200 CPU 󲱘 0 󰧋󴗮󴆃󰦷󴯈󴖯󳸠󲱘(󱳔󰽑󲆣󰏾 CPU 󴛑󱳝󰏸󰏾󴗮󴆃󰦷)󰇄󰳼󰐏󳂭󰕻󰐳󰧃󰒹󲫼󲳌󱑨󱑧󱭛󰓊 \"MBUS_CTRL_P1\" 󰩠 \"MBUS_MSG_P1\"󴗮󴖛1󰧋󴗮󴆃󰦷󴗮󰖵󰇄󴗮󴆃󰦷 1 󲫼 Micro/WIN 󰏢 PG 󱟪 PC 󱓎󳂟󴖲󱥹󰋈󰏸󰏾 CPU 󲱘󴗮󴆃󰦷 0 󴗮󴖛 Profibus 󳓚󴖯󳸠󴖲󱥹󰋄󲬉󳓚󲱘󴩜󳛮 󴖲󱥹󰐎3󰋈3󰋈8󰋈8 -> 󳾕󰳒 01󰋅󰇄 󰦺󰻪󰋈󴳔󳽕󲹂󱅮󴘏󴕥󰴄M󲳌󴖲 󰇄 󰳒. 01 2. 󰦖󱭄󰤍󴜡 󱇍󰑢 MODBUS 󴗮󴆃󰋈󰐏󳂭󰕻󴳔󳽕󲿟󱑣󱑧 \"MBUS_CTRL\" 󰩠 \"MBUS_MSG\"󰋈󰒢󳂭󰕻󴳔󳽕󲿟󱑣󱑧 \"MBUS_INIT\" and \"MBUS_SLAVE\"󰇄 󰳼 Micro/WIN 󰐁󱙼󴳔󳽕󰐎󰐏󳂭󰩠󰒢󳂭󱮄󱓎󰏔󰏾󴹍󲳂󰋈󲿟󱑣󰏢󰦖󱭄󴆒󳕂󳾕󰳒.02󰇄 󱖙󴹏󳽕󰖱󴆕󰐏󳂭󰏢󰒢󳂭󲱘“Baud”󰩠 “Parity” 󲱘󰦖󱭄󴆒󳕂󳽕󰏔󳟈󰋈󱑊󰏨󲿟󱑣󰴫 \"MBUS_MSG\" 󰐁󲱘 \"Slave\" 󰴄󰴔󳽕󰏢󲿟󱑣󰴫 \"MBUS_INIT\" 󰐁󲱘 \"Addr\" 󱠔󴆒󳕂󲱘󰏔󳟈 (󳾕󰳒. 02)󰇄 󰳼 Micro/WIN“󳋏󳒳󰴫”󰐁󴆒󳕂󲱘󴗮󴆃󰦷 0 󲱘󲊶󲡍󲥛󰏢 MODBUS 󰤣󴆂󱮴󰝇 (\"Mode\" = \"1\")󰇄 󰳒. 02 󰏟󴴶󲱘󳸼󱸐󰟫󰟎󰑚󲿟󱑣󰴫󰧘󰏾󰦖󱭄󴗝󴹍󰦞󰝊󰧿󰐝󰇄 󰐏󳂭 MBUS_CTRL 󰦖󱭄 EN Mode Baud Parity Done Error 󳸼 01

1)

󱛣󰐝 󰕓󳛑 󰤣󴆂󴗝󱢽 󰓴󴕧󴗳󲥛 kbps 󱷵󵁠󴗝󱢽 “󱅠󱟤”󱷛󱖫󰔡 󴫭󴇃󰒷󲷕

󴗝󴹍

0=PPI, 1=MODBUS

1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 0=󱮴󱷵󵁠, 1=󰼛󱷵󵁠, 2=󰙊󱷵󵁠

1)

Timeout 󰒢󳂭󲱘󱳔󴭓󰪡󱑨󱯊󴯈 ms

󰦖󲳟 STEP 7 Micro/WIN 󱐂󰡽󰋖\"MODBUS 󰐏󳂭󱠻󳸠 MBUS_MSG 󱯊󲱘󴫭󴇃󰒷󲷕\" 󰇄

MBUS_MSG 󰦖󱭄 EN First Slave RW Addr

󱛣󰐝 󰕓󳛑 󴇏󰝭󴇋󲈖󰔡 󰒢󳂭󰴄󰴔 \"󴇏\" 󱟪 \"󰝭\"

󴇏󰝭󰒢󳂭󲱘󱭄󱥂󰴄󰴔

󴗝󴹍

0=󴇏, 1=󰝭

0 .. 128 = 󱭄󱄫󴞣󴕧󰟎 Q0.0 .. Q15.7 1001 .. 10128 = 󱭄󱄫󴞣󴕧󰜹 I0.0 .. I15.7

30001 .. 30092 = 󱿵󱢳󴞣󴕧󰜹 AIW0 .. AIW62

40001 .. 49999 = 󰖱󱣕󱆘󱄬󰰼 2

1)

Count 󰔡󱟪󱄫󲱘󰏾󱭄 (0xxxx, 1xxxx) / words

(3xxxx, 4xxxx) DataPtr V󱄬󰙼󰤎󴍋󰾟󰴄󰴔󱣛󴩜 Done Error 󳸼 02

1)

'󱅠󱟤' 󱷛󱖫󰔡 󴫭󴇃󰒷󲷕

󰦖󲳟 STEP 7 Micro/WIN 󱐂󰡽󰋖\"MODBUS 󰐏󳂭󱠻󳸠 MBUS_MSG 󱯊󲱘󴫭󴇃󰒷󲷕\" 󰇄

󰒢󳂭 MBUS_INIT

󰦖󱭄 EN Mode Addr Baud Parity Delay MaxIQ MaxAI

󱛣󰐝 󰕓󳛑 󰤣󴆂󴗝󱢽 󰒢󳂭󰴄󰴔 󰓴󴕧󴗳󲥛 kbps 󰼛󰙊󱷵󵁠 󱓊󱯊󱯊󴯈 ms

󱳔󰻻󱭄󱄫󴕧󰜹󴕧󰟎󲚍󱭄 󱳔󰻻󱿵󱢳󴞣󴕧󰜹󲚍󱭄

󴗝󴹍

0=PPI, 1=MODBUS

1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200

0=󱮴󱷵󵁠, 1=󰼛󱷵󵁠, 2=󰙊󱷵󵁠

2)2)2)

MaxHold 󱳔󰻻󰖱󱣕󱆘󱄬󰰼󱄫󱭄󴞣 HoldStart 󰖱󱣕󱆘󱄬󰰼󰤎󴍋󰾟󰴄󰴔

(40001) Done Error 󳸼 03

2)3)

3)

󱅠󱟤󱷛󱖫󰔡 󴫭󴇃󰒷󲷕

󱳔󰻻󲱘󰴄󰴔󰦪󰞇󰑢󱠔󲫼 CPU󲱘 󳉏󰵟󰦞󰝊󱳔󰻻󰘐󰇄

󰦖󲳟 STEP 7 Micro/WIN 󱐂󰡽󰋖“MODBUS󰒢󳂭󰤣󴆂󲱘󴫭󴇃󰒷󲷕”󰇄

MBUS_SLAVE 󰦖󱭄 EN Done Error 󳸼 04

3)

󱛣󰐝 󰕓󳛑 󱅠󱟤󱷛󱖫󰔡 󴫭󴇃󰒷󲷕

󴗝󴹍

3)

󰦖󲳟 STEP 7 Micro/WIN 󱐂󰡽󰋖 “MODBUS󰒢󳂭󰤣󴆂󲱘󴫭󴇃󰒷󲷕” 󰇄

3. 󱑧󲱘󱄬󰙼󰴄󰴔

󴹍󲳂󱅠󱟤󰧢󱖙󴹏󳽕󰳼 Micro/WIN 󰐁󱅮󰐝󱑧󲱘󱄬󰙼󰴄󰴔󰋈󱔧󱅮󰐝󱅠󱄬󰙼󰤎󰧢, 󳽕󰖱󴆕󰳼󰓏󰔩󱚙󰞉󰏟󰏡󳛑󰝡󳹿󰝊󱅗󲿟󱑣󱠔󰕓󲫼 (󰐏󳂭󰕻: \"DataPtr\" + \"Count\" 󰒢󳂭󰕻󰋖 \"HoldStart\" + \"MaxHold\")󰇄

󰳒. 03 4. 󰖱󱣕󱆘󱄬󰰼󰘐󲱘󰓴󴕧 󱇚󲿟󱑣󰏟󴕑󰠄󲳌󱑨󲱘 CPU 󰧢󰋈󰧃󰒹󰳼󲢊󱗕󳸼󰐁󳒭󰐏󳂭󰕻󲱘 V 󱄬󰙼󰤎󴌟󰘐󰋈󲜊󰧢󰒢󳂭󰕻󲲥󳾚󱭄󰘐󲱘󰦬󰣪󰇄 󱔧󰐏󳂭󲱘 I0.0 󰕓󳛑󰧢󰋈VW2 󰐁󲱘󰝙󱆍󱈅󳹿󰦥󴗕󰠄󰒢󳂭󱑊󰝭󰜹󰒢󳂭󲱘 VW2 󰇄 󰖱󱣕󱆘󱄬󰰼󰘐󲱘󰓴󴕧󳾕󰳒. 04󰇄 󱣛󴩜 \"DataPtr\" 󰒷󳸼󰑚󳹿󴇏󲱘 V 󰤎󴍋󰾟󰴄󰴔󰇄 󰦖󱭄 \"Count\" 󱣛󱅮󰑚󳹿󰝭󰜹󰴄󰴔 \"Addr\" = \"4xxxx\" (󰖱󱣕󱆘󱄬󰰼)󱄫󲱘󰏾󱭄󰇄 󲳌󱑨 V 󱄬󰙼󰤎󲱘󰦬󴞣󱇚󳹿󰝭󰠄󰖱󱣕󱆘󱄬󰰼󰨃󰾟󰴄󰴔 \"Addr\" = \"40002\" (\"RW\" = \"1\")󰐁󰇄 󰖱󱣕󱆘󱄬󰰼󱰃󰒹󱄫󰐎󰤩󰔡󰓴󴕧󲱘󰋈󱅗󰏢󰒢󳂭󲱘 V 󰤎󰴄󰴔󱇍󱑨󰇄 󱣛󴩜 \"HoldStart\" 󱣛󱅮󰑚󰏢󰖱󱣕󱆘󱄬󰰼󴍋󰾟󰴄󰴔 40001 󲳌󱇍󱑨󲱘V󱄬󰙼󰤎󲱘󰟱󰾟󰴄󰴔󰇄 󰧃󰒹󱣝󰏟󴴶󰝀󱓣󴅵󳅫󰒢󳂭󲱘V󰤎󲳂󱷛󱣛󴩜󰋖 2 * (Addr - 40001) + HoldStart = 2 * (40002 - 40001) + &VB0 = &VB2 󰦺󰻪󰋈󳽕󰖱󴆕󰐏󳂭󰕻󱠔󳽕󰝭󰜹󲱘󱭄󱥂󰤎󰣙󰧿󰳼 \"MaxHold\" 󱅮󰐝󲱘󱭄󱥂󰤎󰝙 󰋖 MaxHold >= Addr - 40001 + Count = 40002 - 40001 + 1 = 2 󰳒. 04 󱴵󲳂󰧋:27832511 󱮹󱳳:2008-05-27 󰝇󰑢 STEP 7 Micro/WIN MOBDUS 󱑧󲱘󱳈󰻮󰖵󱙃󰧃󰒹󰦖󲳟 S7-200 󳋏󳒳󱠟󰝠 ( 󱴵󲳂 1109582) 󰩠 STEP 7 Micro/WIN 󱐂󰡽󰇄