Siemens SIMATIC S7-300 FM 350-1 - Page 144

Operating Modes, parameters and commands
7.4 Measuring modes
FM 350-1 Counter module
144 Manual, 05/2011, A5E03648639-01
Limit Monitoring
The following value ranges are permitted for limit value monitoring:
Table 7- 36 Speed capture: Value Ranges for Limit Monitoring
Lower limit n
u
Upper limit n
o
0 to 24 999 999 *10
-3
/min n
u
+1 to 25 000 000 *10
-3
/min
Possible Measuring Ranges with Error Information (for Number of Pulses per Encoder Revolution
= 60)
Table 7- 37 Speed Capture: Measuring Ranges and Errors
Speed n
min
Absolute error Speed n
min
Absolute error
1 /min ±0.04 /min 1 000 /min ±0.21 /min
10 /min ±0.04 /min 10 000 /min ±1.82 /min
100 /min ±0.05 /min 25 000 /min ±4.5 /min
Function of the DI Start and DI Stop Digital Inputs
You can choose between the following functions for the digital inputs:
● Level-controlled hardware gate
● Edge-controlled hardware gate
See Chapter Command: Open and close gate (Page 149))
Function of Digital Output DO0
You can choose between the following functions for digital output DO0:
● No comparison (no switching by limit value monitoring)
● Measured value outside limits
● Measured value under lower limit
● Measured value above upper limit
(See the section Behavior of the Digital Outputs (Page 153))