Process Alarm Data Ep-5111; Setting Up The Counter; Counter Functions - Emerson PACSystems RSTi-EP User Manual

User Manual
GFK-2958J

Process Alarm Data EP-5111

Byte Bit
X0.0
X0.1
X0.2
B0
X0.3
X0.4
X0.5 - X0.7
X1.0
X1.1
X1.2
B1
X1.3
X1.4
X1.5- X1.7
B2
B3

Setting Up the Counter

To start a counting process at least the signal mode needs to be parameterized and a rising
edge at the bit QX8.2 ("Set SW gate") of the control word is required.
You can define the counter functions by parameterizing: the counting mode, a primary
direction (counting up or down), the counting behavior, and the hardware gate function
(input gate). In addition, you can parameterize output setting options (comparison
function, hysteresis) as well as producing a process alarm (refer to Chapter 5.16.10,
Additional Counter Features).
Counting Range, Count Limits
The maximum count limits are predetermined by the register size and cannot be changed.
Maximum Counting Range
Limit
Lower count limit
Upper count limit

Counter Functions

Counting Mode
Depending on the application you can chose the counting mode:
•
•
Detailed Description of I/O Modules
Function
HW gate activated
HW gate deactivated
Overflow, underflow or end value reached
Comparison value reached
Latch value reached
reserved
Status input channel 0 A (track A)
Status input channel 0 B (track B)
Status input "Latch"
Status input "Gate"
Status input "Reset"
reserved
16-bit time stamp 0 ... 65,535μs, rotating
Endless counting, for example, for position detection with a rotary encoder
1-time counting with or without primary direction, for example, for counting
products up to a maximum limit
Value
–2 147 483 648 (–231)
+2 147 483 647 (231 – 1)
Chapter 5
Oct 2019
172