General¶
Several of the S500 modules have an integrated Fast Counter. If this counter is used, it uses up to 2 digital inputs and one digital output (provided that it is available). The counter can be deactivated. In this case, the inputs and outputs reserved for the counter are usable for other tasks.
The Fast Counter is available in the following constellations:
- in expansion modules, mounted on I/O-Bus of an AC500-CPU;
- in CS31 Bus Modules DC551-CS31, CI592-CS31 and CI590-CS31-HA, including a Fast Counter, which can be set operational via the address setting of the module;
- in PROFINETâ Bus Modules CI501-PNIO (V3) or CI502-PNIO (V3) and the expansion modules connected via I/O-Bus;
- in expansion modules, connected to PROFINETâ Bus Modules CI504-PNIO or CI506-PNIO;
- in PROFIBUSâ Bus Modules CI541-DP or CI542-DP and the expansion modules connected via I/O-Bus;
- in CANopenâ Bus Modules CI581-CN or CI582-CN.
The following table shows which of the S500 Modules contain a Fast Counter and which of the digital inputs and outputs are reserved for the counter.
| Fast Counters integrated in S500 Modules | |||||
|---|---|---|---|---|---|
| Module | Integrated Fast Counter | assigned inputs *1) | Assigned output | Remarks | |
| Channel A | Channel B | Channel C *2) or (CF) | |||
| AI523, AO523 | no | - | - | - | |
| AI531, AI561, AI562, AI563 | no | - | - | - | |
| AX521, AX522, AX561 | no | - | - | - | |
| DC505-FBP | no | - | - | - | |
| DA501 | yes | DC16 | DC17 | DC18 | Counter function is not available, if the modules are mounted at the I/O-Bus of CI581-CN or CI582-CN. |
| DA502 | yes | DC16 | DC17 | DC18 | |
| DC522 | yes | C8 | C9 | C10 | |
| DC523 | yes | C16 | C17 | C18 | |
| DC532 | yes | C24 | C25 | C26 | |
| DC561 | no | - | - | - | |
| DI524 | yes | I24 | I25 | No hardware output available | |
| DI561, DI562, DI571 | no | - | - | - | |
| DO524, DO561, DO571, DO572 | no | - | - | - | |
| DX522 | yes | I0 | I1 | The counter does not activate any relay output | |
| DC551-CS31 | yes | C16 | C17 | C18 | Counting function is activated by the address setting on the module *3) |
| CI501-PNIO, CI502-PNIO, CI511-ETHCAT, CI512-ETHCAT | - | - | - | - | |
| CI501-PNIO (V3), CI541-DP, CI581-CN | yes | DI0 | DI1 | DO0 | |
| CI502-PNIO (V3), CI542-DP, CI582-CN | yes | DI8 | DI9 | DO8 | |
| CI590-CS31-HA | yes | C8 | C9 | C10 | Counting function is activated by the address setting on the module 3) |
| CI592-CS31 | yes | DC8 | DC9 | DC10 | |
| DX531, DX561, DX571 | no | - | - | - | |
*1) The two hardware inputs (channels A and B) are also and always available within the normal process image, independent of the operating mode of the counter.
*2) The hardware output channel C is activated by the Fast Counter only in the operating modes 1 and 2. In the other operating modes, this output can be used for other purposes.
*3) The counting function of the CS31 Bus Modules can only be activated, if a bus address greater than 70 is set on the module by means of the address rotary switches. In this case, the effective bus address equals the set address minus 70 and the counter is ready for operation. An example: A set bus address of 83 means that the effective bus address = (83 - 70) = 13 and that the integrated Fast Counter can be used.