Siemens IP-Module Manual Pagina 251

  • Descarga
  • Añadir a mis manuales
  • Imprimir
  • Pagina
    / 360
  • Tabla de contenidos
  • SOLUCIÓN DE PROBLEMAS
  • MARCADORES
  • Valorado. / 5. Basado en revisión del cliente
Vista de pagina 250
Communication Between the CPU and the IP 266 IP 266
The IP 266 scans this TOGGLE bit in each firmware cycle, and starts a new job
where appropriate (see Figure 7-2).
Figure 7-2. Interpreting a Job Order in Dependence on the TOGGLE Bit
Bit 7
t
1
0
IP 266
cycle
Job request is interpreted in this cycle
Cycle trigger; beginning of a new cycle
Example: Give the IP 266 the Start command for the specified mode by coding
byte 1 as shown below. Before the command was forwarded to the IP, bit 7 was 0.
Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
1 1 0 0 0 0 1 0 0
This issues the Start command "Forward" to the IP 266. The mode is started be-
cause the TOGGLE bit (bit 7) changed from 0 to 1.
7-6
EWA 4NEB 812 6057-02
Vista de pagina 250
1 2 ... 246 247 248 249 250 251 252 253 254 255 256 ... 359 360

Comentarios a estos manuales

Sin comentarios