Examples of Impossible ConfigurationsΒΆ
Due to the peculiarities concerning the CS31 bus and the DC551-CS31 described at the beginning of this chapter, some configurations cannot be realized. Here are some examples:
Example 1: DC551-CS31 + 6 x DC532
| Device | I/O range | Digital area | Analog area | Parameter | ||
|---|---|---|---|---|---|---|
| Inputs | Outputs | Inputs | Outputs | |||
| Byte | Byte | Words | Words | Byte | ||
| DC551 | 8 DI + 16 DC | 3 | 2 | 0 | 0 | 15 |
| DC532 | 16 DI + 16 DC | 4 | 2 | 0 | 0 | 9 |
| DC532 | 16 DI + 16 DC | 4 | 2 | 0 | 0 | 9 |
| DC532 | 16 DI + 16 DC | 4 | 2 | 0 | 0 | 9 |
| DC532 | 16 DI + 16 DC | 4 | 2 | 0 | 0 | 9 |
| DC532 | 16 DI + 16 DC | 4 | 2 | 0 | 0 | 9 |
| DC532 | 16 DI + 16 DC | 4 | 2 | 0 | 0 | 9 |
| DC532 | 16 DI + 16 DC | 4 | 2 | 0 | 0 | 9 |
| Total | 120 DI + 128 DC | 31 | 16 | 0 | 0 | 78 |
This configuration is not possible because the DC551 can manage a maximum of 30 bytes in the digital area (= 120 inputs/outputs).
Example 2: DC551-CS31 + 6 (or more) AX522
| Device | I/O range | Digital area | Analog area | Parameter | ||
|---|---|---|---|---|---|---|
| Inputs | Outputs | Inputs | Outputs | |||
| Byte | Byte | Words | Words | Byte | ||
| DC551 | 8 DI + 16 DC | 3 | 2 | 0 | 0 | 15 |
| AX522 | 8 AI + 8 AO | 0 | 0 | 8 | 8 | 40 |
| AX522 | 8 AI + 8 AO | 0 | 0 | 8 | 8 | 40 |
| AX522 | 8 AI + 8 AO | 0 | 0 | 8 | 8 | 40 |
| AX522 | 8 AI + 8 AO | 0 | 0 | 8 | 8 | 40 |
| AX522 | 8 AI + 8 AO | 0 | 0 | 8 | 8 | 40 |
| AX522 | 8 AI + 8 AO | 0 | 0 | 8 | 8 | 40 |
| Total | 8 DI + 16 DC + 48 AI + 48 AO | 3 | 2 | 48 | 48 | 255 |
This configuration is not possible because the DC551-CS31 can manage a maximum of 40 words in the analog area. For 7 AX522, the number of analog channels increases accordingly.
Example 3: DC551-CS31 + 3 (or more) AO523
| Device | I/O range | Digital area | Analog area | Parameter | ||
|---|---|---|---|---|---|---|
| Inputs | Outputs | Inputs | Outputs | |||
| Byte | Byte | Words | Words | Byte | ||
| DC551 | 8 DI + 16 DC | 3 | 2 | 0 | 0 | 15 |
| AO523 | 16 AO | 0 | 0 | 0 | 16 | 42 |
| AO523 | 16 AO | 0 | 0 | 0 | 16 | 42 |
| AO523 | 16 AO | 0 | 0 | 0 | 16 | 42 |
| Total | 8 DI + 16 DC + 48 AO | 3 | 2 | 0 | 48 | 141 |
This configuration is not possible because the DC551-CS31 can manage a maximum of 40 words in the analog area. For each further AO523, the number of analog channels increases accordingly.
Example 4: DC551-CS31 + 3 (or more) AI523
| Device | I/O range | Digital area | Analog area | Parameter | ||
|---|---|---|---|---|---|---|
| Inputs | Outputs | Inputs | Outputs | |||
| Byte | Byte | Words | Words | Byte | ||
| DC551 | 8 DI + 16 DC | 3 | 2 | 0 | 0 | 15 |
| AI523 | 16 AI | 0 | 0 | 16 | 0 | 37 |
| AI523 | 16 AI | 0 | 0 | 16 | 0 | 37 |
| AI523 | 16 AI | 0 | 0 | 16 | 0 | 37 |
| Total | 8 DI + 16 DC + 48 AI | 3 | 2 | 48 | 0 | 126 |
This configuration is not possible because the DC551-CS31 can manage a maximum of 40 words in the analog area. For each further AI523, the number of analog channels increases accordingly.
Example 5: DC551-CS31 with FC + 3 (or more) AO523
| Device | I/O range | Digital area | Analog area | Parameter | ||
|---|---|---|---|---|---|---|
| Inputs | Outputs | Inputs | Outputs | |||
| Byte | Byte | Words | Words | Byte | ||
| DC551 | 8 DI + 16 DC + FC | 5 | 4 | 4 | 8 | 16 |
| AO523 | 16 AO | 0 | 0 | 0 | 16 | 42 |
| AO523 | 16 AO | 0 | 0 | 0 | 16 | 42 |
| AO523 | 16 AO | 0 | 0 | 0 | 16 | 42 |
| Total | 8 DI + 16 DC + FC + 48 AO | 5 | 4 | 4 | 56 | 142 |
This configuration is not possible because the DC551-CS31 can manage a maximum of 40 words in the analog area. For each further AO523, the number of analog channels increases accordingly.
Example 6: DC551-CS31 with FC + 3 (or more) AI523
| Device | I/O range | Digital area | Analog area | Parameter | ||
|---|---|---|---|---|---|---|
| Inputs | Outputs | Inputs | Outputs | |||
| Byte | Byte | Words | Words | Byte | ||
| DC551 | 8 DI + 16 DC + FC | 5 | 4 | 4 | 8 | 16 |
| AI523 | 16 AI | 0 | 0 | 16 | 0 | 37 |
| AI523 | 16 AI | 0 | 0 | 16 | 0 | 37 |
| AI523 | 16 AI | 0 | 0 | 16 | 0 | 37 |
| Total | 8 DI + 16 DC + FC + 48 AI | 5 | 4 | 52 | 8 | 127 |
This configuration is not possible because the DC551-CS31 can manage a maximum of 40 words in the analog area. For each further AI523, the number of analog channels increases accordingly.