Siemens SIMATIC 505 - Sample Discrete Output Control Values; Discrete Output Control

Discrete Outputs
4-4
4.3 Discrete Output Control
4.3.1
Control of each discrete output is done in ten steps. These ten steps
correspond with the analog ten-step profile. Each profile is assigned a 16-bit
word for each discrete output. See Figure 4-2.
Bit 6 is the enable/disable bit for each word. A value of 1 in bit 6 enables the
discrete output in that profile and a value of 0 in bit 6 disables it. A discrete
output cannot be turned on unless bit 6 of its control word is set to 1. Bits
7–16 represent steps 10 through 1, respectively . A value of 1 in any of bits
7–16 turns on that discrete output during the corresponding step of that
profile. A value of 0 in any of the bits 7–16 turns off that discrete output
during the corresponding step of that profile. T able 4-1 lists the download
table memory map.
As shown in Figure 4-2, clamp close profile word 236, discrete output 1 is on
in steps 1 to 4, off in steps 5 to 8, and on in steps 9 and 10.
W ord enable bit
109 876 5 4321
Profile steps
Figure 4-2 Sample Discr ete Output Contr ol V alues
T able 4-1 Download T able Memory Map
Location Profile
Discrete
Output
Location Profile
Discrete
Output
236 1 248 1
237 Clamp close 2 249 Plasticate 2
238 3 250 3
239 4 251 4
240 1 252 1
241 Inject 2 253 Clamp open 2
242 3 254 3
243 4 255 4
244 1
245 Pack and hold 2
246 3
247 4
Download T able
Wor ds 236–255