信息类型RTU协议有四中信息类型:查询、正常响应、错误响应和广播。查询主设备发送一-个查询信息到-一个从设备。正常响应在从设备执行查询所请求的功能之后，发回一个针对该功能的正常响应，表示请求成功。错误响应从设备接收到查询，但不能执行所请求的功能。从设备送回一个错误响应，指出请求不能执行的原因。(有些错误没有错误信息送出。更多信息见“通讯错误”。)

 

Underwriters Laboratories Transformer B-5168 #29619

Cincinnati Electrosystems Display 4161-3-15, 7 Segment

Siemens Relay 3TH82 44-0B #35256

Bosch Plug-In Card Block Stand 1834 486 001 #33173

Dayton Oil Burner Motor 6K315D 1/4 Hp, 3450 RPM #33767

General Electric Contactor CR353AD3BA1 #33536

General Electric Contactor CR353AD3B*1 #33524

Allen Bradley 1794-ADN Devicenet Adapter Ser B #33011

Toshiba Power Module MG100J6ES52 #37316

MDI Mercury Relay 360NO-120A-18 #26001

Red Lion Current Meter APLID400, #8874

Appleton Electric Snap Switch EFS175-F3W 20T Amp #28736

Cutler Hammer Safety Switch DH361FGK, 30 Amp #26170

Allen Bradley Limit Switch 802T-APJ1 #34751

Brad Harrison / Woodhead Cable 114031K12M030 #34783

Cooper Crouse Hinds Mini Line Connector Cable 50001

Sterling Valve GS023320N #36772

Allen Bradley Input Module 1746-IA16, Series C, SLC 500

Lumberg Devicenet Distribution Box 0931 DNC 302 #35282

Diversified Electronics Phase Sequence & Loss Monitor S

Siemens Contactor 3TF4222-OA #16693