West Control Solutions N6600 - Manual (Page 26)

control requirements) in order to maximise relay life. For an SSR Drive Output, the
cycle time may have a lower value (and thus satisfy the requirements of a
fast-changing process variable e.g. flow or pressure). The permitted range of
values is:
0.5, 1, 2, 4, 8, 16, 32, 64, 128, 256 or 512 seconds
The default value is 32 seconds. This parameter is not applicable if Proportional
Band 1 is set to 0.
3.2.18 Output 2 Cycle Time
The cycle time value required is dependent upon the process being controlled
and the type of output being used for Output 2. For a Relay Output, the cycle
time should be as large as possible (whilst remaining compatible with the process
control requirements) in order to maximise relay life. For an SSR Output, the cycle
time may have a lower value (and thus satisfy the requirements of a fast-changing
process variable e.g. flow or pressure). The permitted range of values is:
0.5, 1, 2, 4, 8, 16, 32, 64, 128, 256 or 512 seconds
The default value is 32 seconds. This parameter is not applicable if Proportional
Band 1 or Proportional Band 2 is set to 0.
3.2.19 Process High Alarm 1 Value
This parameter, applicable only when Alarm 1 is selected to be a Process High
alarm, defines the process variable value at or above which Alarm 1 will be
active. Its value may be adjusted between Input Range Maximum and Input
Range Minimum. Its default value is Input Range Maximum. The operation of a
process high alarm is illustrated in Figure 3-2.
3.2.20 Process Low Alarm 1 Value
This parameter, applicable only when Alarm 1 is selected to be a Process Low
alarm, defines the process variable value at or below which Alarm 1 will be
active. Its value may be adjusted between Input Range Maximum and Input
Range Minimum. Its default value is Input Range Minimum. The operation of a
process low alarm is illustrated in Figure 3-2.
3.2.21 Band Alarm 1 Value
This parameter, applicable only if Alarm 1 is selected to be a Band Alarm, defines
a band of process variable values, centred on the setpoint value. If the process
variable value is outside this band, the alarm will be active. This parameter may
be adjusted to be within
± (input span) from the setpoint. The default value is five
input units. The operation of a band alarm is illustrated in Figure 3-2.
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PM-0075