PLC在正式運行時，不需要編程器。編程器主要用來進行用戶程序的編制、存儲和管理等，并將用戶程序送入PLC中，在調試過程中，進行監控和故障檢測。S7-200系列PLC可采用多種編程器，一般可分為簡易型和智能型。
簡易型編程器是袖珍型的，簡單實用，價格低廉，是一種很好的現場編程及監測工具，但顯示功能較差，只能用指令表方式輸入，使用不夠方便。智能型編程器采用計算機進行編程操作，將專用的編程軟件裝入計算機內，可直接采用梯形圖語言編程，實現在線監測，非常直觀，且功能強大，S7-200系列PLC的專用編程軟件為STEP7-Micro/WIN。
4．程序存儲卡ROD320002 
為了保證程序及重要參數的安全，一般小型PLC設有外接EEPROM卡盒接口，通過該接口可以將卡盒的內容寫入PLC，也可將PLC內的程序及重要參數傳到外接EEPROM卡盒內作為備份。程序存儲卡EEPROM有6ES 7291-8GC00-0XA0和6ES 7291-8GD00-0XA0兩種，程序容量分別為8K和16K程序步。
5．寫入器
寫入器的功能是實現PLC和EPROM之間的程序傳送，是將PLC中RAM區的程序通過寫入器固化到程序存儲卡中，或將PLC中程序存儲卡中的程序通過寫入器傳送到RAM區。
6．文本顯示器
文本顯示器TD200不僅是一個用于顯示系統信息的顯示設備，還可以作為控制單元對某個量的數值進行修改，或直接設置輸入/輸出量。文本信息的顯示用選擇/確認的方法，*多可顯示80條信息，每條信息*多4個變量的狀態。過程參數可在顯示器上顯示，并可以隨時修改。TD200面板上的8個可編程序的功能鍵，每個都分配了一個存儲器位，這些功能鍵在啟動和測試系統時，可以進行參數設置和診斷。

NEW WAUKESHA MW224B 200 IRON STAINLESS FLANGED 2 IN BUT


BRAY 90-0830-21320-5?32 AIR ACTUATOR STAINLESS DISC 4IN 


NELES JAMESBURY 815W-11-3600 PNEUMATIC 150 STAINLESS 6I


KEYSTONE D24 PNEUMATIC IRON BODY STAINLESS DISC 2-1/2IN


NEW VALTORC 400SS-BFV-WF-VT?85DA-9AAG STAINLESS 4 IN BUTROD320002 


NEW KEYSTONE FU9U-006 150-954-307-792?-211 K-SWITCH 4IN 


NEW KEYSTONE 134 MANUAL IRON STAINLESS WAFER BUTTERFLY 


ULTRAFLO UDA 8 ULTRATORQ 2 IN PNEUMATIC IRON STAINLESS 


TRI CLOVER ASP-F304/304L LUMACO SANITARY STAINLESS 3/4I


TRI CLOVER TYPE LK ALFA LAVAL 1 IN PNEUMATIC TRI-CLAMP 


TRI CLOVER SANITARY LADISH BODY 4 IN STAINLESS TRI-CLAM


VALBIA DA63 8BAR 80DA0112 PNEUMATIC IRON STAINLESS 2 IN


CRANE 04-1DA-221RTG-B?0J 4 IN PNEUMATIC 150 STAINLESS BU


KEYSTONE 206-080-100-003 STEEL BODY STAINLESS DISC 8 IN


KEYSTONE PNEUMATIC STEEL BODY STAINLESS DISC 4 IN BUTTE


NEW DEZURIK 9375391R004 16 IN IRON FLANGED BUTTERFLY VA


BRAY 90-0830-21320-5?32 STAINLESS FLANGED 4IN BUTTERFLY 


BRAY 91-0835-21320-5?32 3 IN PNEUMATIC STAINLESS FLANGED


TRI CLOVER LKLA-NC 2 IN PNEUMATIC STAINLESS TRI-CLAMP B


MILWAUKEE HP1LCS4211-2 150 STAINLESS DISC FLANGED 4 IN 


FISHER POSI-SEAL 3 IN PNEUMATIC 150 STAINLESS WAFER BUT


TURN-ACT 999-B824A VAL-U-ACT 1-1/2 IN NPT PNEUMATIC BUT


DEZURIK 81818-3 ACTUATOR POSITIONER PMV STAINLESS 2IN B


NELES JAMESBURY L12A350AA 14 IN PNEUMATIC 150 ECCENTRIC


KEYSTONE 312 CLASS 150 3-1/2 IN STAINLES BUTTERFLY VALV


TRI CLOVER TYPE LK ALFA LAVAL 2 IN PNEUMATIC TRI-CLAMP 


ALFA LAVAL LKLA 2 IN PNEUMATIC STAINLESS TRI-CLAMP BUTT


TRI CLOVER LKLA-NC SANITARY 1-1/2 IN STAINLESS TRI-CLAM


CRANE 06-1WA-221RTG-B?OJ FLOWSEAL 6 IN 150 STAINLESS BUT


TRI CLOVER 2 IN STAINLESS SANITARY TRI-CLAMP BUTTERFLY 


INOXPA 1-1/2 IN STAINLESS TRI-CLAMP BUTTERFLY VALVE B45


TRI CLOVER SANITARY 2 IN PNEUMATIC STAINLESS TRI-CLAMP 


04266 D1 IRON STAINLESS FLANGED 6 IN BUTTERFLY VALVE B2


NELES JAMESBURY 815W-11-3600TT? PNEUMATIC 150 24IN BUTT


NELES JAMESBURY 815L-11 STEEL WAFER FLANGE 3 IN BUTTERF


BRAY 50-0706-11510-5?32 3 IN IRON STAINLESS FLANGED BUTT


CONBRACO PNEUMATIC ACTUATOR 150 STAINLESS FLANGED 16 IN


FISHER A41 POSI-SEAL 6 IN PNEUMATIC 150 STAINLESS WAFER


ALFA LAVAL LKLA 1-1/2 IN PNEUMATIC STAINLESS TRI-CLAMP 


BRAY ND4786 90-0830-21320-5?32 PNEUMATIC STAINLESS 6 IN 


DEZURIK N-J-4 PNEUMATIC 150 STAINLESS FLANGED 20 IN BUT


CANDIGRA SANITARY HANDLE 1 IN MANUAL STAINLESS TRI-CLAM


NEW GRINNELL WC-8271-4 200WP SERIES 8000 2IN BUTTERFLY 


EBRO EB6 PNEUMATIC IRON STAINLESS 4 IN BUTTERFLY VALVE 


JP 100-4 VITON UPVC 150PSI 4 IN 100 FLANGED BUTTERFLY V


SANITARY 6 IN STAINLESS TRI-CLAMP BUTTERFLY VALVE B4578


G&H 4 IN PNEUMATIC STAINLESS TRI-CLAMP BUTTERFLY VALVE 


FISHER A41 POSI-SEAL 4 IN 150 STEEL STAINLESS WAFER BUT


TRI CLOVER TYPE LK ALFA LAVAL 4 IN STAINLESS TRI-CLAMP 


NELES 815L113600XZ VPVL350 ACTUATOR 150 WAFER FLANGE 6I


KEYSTONE 990 4 IN PNEUMATIC 150 STAINLESS WAFER BUTTERF
FISHER 657 PNEUMATIC STEEL FLANGED 5 IN BUTTERFLY VALVE


FISHER 657 BRONZE DISC PNEUMATIC STEEL FLANGED 5 IN BUT


NEW DEMCO J022237-1212379 ME-C 4 IN IRON STAINLESS WAFE


FISHER 656 PNEUMATIC 125 IRON FLANGED 5 IN BUTTERFLY VA


NEW DELTECH N/A PNEUMATIC STEEL 2 IN BUTTERFLY VALVE D2


NELES JAMESBURY 8 IN PNEUMATIC STAINLESS WAFER BUTTERFL


TRI CLOVER SANITARY DISC BODY 2 IN STAINLESS TRI-CLAMP 


BRAY 90-0630-21320-5?32 ACTUATOR 2IN STAINLESS DISC WAFE


EBRO EB4 DW 10 BAR 1-1/2 IN PNEUMATIC STEEL STAINLESS B


TRI CLOVER 1-1/2 IN PNEUMATIC STAINLESS TRI-CLAMP BUTTE


SHAW 152-DHML 285PSI 150 STAINLESS DISC FLANGED 2-1/2 I


BRAY 01.0 2 IN IRON BODY STAINLESS DISC BUTTERFLY VALVE


NELES JAMESBURY L12A100AA 4 IN PNEUMATIC 150 STAINLESS 


TRI CLOVER LKLA-NC SANITARY 2 IN STAINLESS TRI-CLAMP BU


NELES JAMESBURY 10-815L-11-3600?TT-A 150 STAINLESS 10 IN


BRAY 20-0600-92801-5?61 90-0830-21320 STEEL FLANGED 6 IN


FISHER 1052 PNEUMATIC 150 STAINLESS FLANGED 8 IN BUTTER


FISHER 657 4 IN PNEUMATIC IRON BRONZE FLANGED BUTTERFLY


TRI CLOVER SANITARY 4 IN PNEUMATIC STAINLESS TRI-CLAMP 


FISHER 8500 1052 SIZE 30 PNEUMATIC 600 STAINLESS 3 IN B


G&H 3/4 IN STAINLESS TRI-CLAMP BUTTERFLY VALVE B454776


CANDIGRA SANITARY HANDLE 1IN STAINLESS TRI-CLAMP BUTTERROD320002