Festo CPX-P-8DE-N Series, Description

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3. Input module CPX-P-8DE-N-...
3-40
Festo P.BE-CPX-P-EA-EN en 1209NH English
Module parameter: Lower limit value (B, C, D) Handheld
This parameter is only available in the extended process image (miniature switch = ON).
Function no. 4828 + m * 64 + 18 (channel 0, low byte) m = module number (0 ... 47)
4828 + m * 64 + 19 (channel 0, high byte)
4828 + m * 64 + 20 (channel 1, low byte)
4828 + m * 64 +
21
(channel 1, high byte)
4828 + m * 64 + 22 (channel 2, low byte)
4828 + m * 64 + 23 (channel 2, high byte)
4828 + m * 64 + 24 (channel 3, low byte)
4828 + m * 64 + 25 (channel 3, high byte)
Description Specifies the lower limit value (only channel 0 ... 3).
– Operating mode B: Incremental counters count starting from the lower limit
value. Upon reaching the lower limit value, decremental counters set the bit
assigned to the relevant channel in byte 0 of the PII.
– Operating mode C, D: If the value falls below the lower limit value, this is
signaled by setting the corresponding bits in byte 0 of the PII ( Tab. 3/9). The
smallest detectable frequency depends on the gate time ( Tab. 3/31).
Bit Bit 0 ... 7: High byte or low byte of the value
for the respective channel
Values Lower limit value
Permissible range of values
– Operating mode B: -32768 ... 32767
– Operating mode C: 0 … 999
– Operating mode D: 0 … 9999
Bit 0 ... 7:
High byte (presetting = 0)
Bit 0 ... 7: Low byte (presetting = 0)
[Lower limit]
[Ch 0]
...
[Ch 3]
Comment An alteration of the parameter causes an initialisation of the respective channel.
– Operating mode B: For additional information
section 3.3.5.
– Operating mode C, D: For additional information section 3.3.6.
Tab. 3/32: Lower limit value (channel-specific, channel 0 …3)
The following applies for the limit values:
– Lower limit value (LLV) < upper limit value (ULV)
– For operating mode C, D:
Difference between LLV and ULV: > than 2/T
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