Digital Output; Redundancy Mode - Siemens MASS 2100 Operating Instructions Manual

● Direction = Positive
● Frequency Value High = 12 kHz
● Frequency Value Low = 2 kHz
● Flow Value High = 15 kg/s
● Flow Value Low = 5 kg/s
Measured massflow value = 7.5 kg/s (constant)
Result:
● Frequency = 4.5 kHz
Note
The connected equipment must be capable of registering the full range of frequencies
configured.
11.5.4

Digital output

The status output can be used to show alarm status or to control the dosing and it can be
signaled on Signal Output or Relay Output.
Depending on the Alarm Mode setting, multiple alarms can be signaled on the output and
selected from the alarm class or the Individual alarms lists.
● Alarm Class: Alarm will be signaled if alarm within the selected alarm class occurs.
● Individual alarms: Alarm will be signaled if selected Individual alarms occurs. It is possible
to select more multiple alarms to be signaled.
Note
Alarm class
The alarm class options depend on the Alarm Mode setting, either NAMUR or Standard
(Siemens Standard), selected in menu item 3.2.1. Both NAMUR and Siemens Standard
alarms and their messages are described in more detail in Fault codes and corrective
actions (Page 188).
The control output can be used for controlling discrete valve dosing and analog valve dosing
as described in Dosing (Page 155).
11.5.5

Redundancy mode

If both channel 2 and channel 3 are configured as either pulse outputs or frequency outputs,
channel 3 can be configured for redundancy mode to follow channel 2 shifted by 90˚or 180˚
of the functional width of the pulse. If set to redundancy mode, channel 3 inherits all channel
2 settings. The functional width of the pulse is two times the pulse "On" duration. The flow
direction will determine whether channel 3 is shifted before or after channel 2.
MASS 2100 & FC300 (FCT030)
Operating Instructions, 06/2017, A5E39789040-AA
Technical data
11.5 Outputs
229