Pro-EC44 2-Loop Graphical Profile Controller & Recorder
Pro-EC44 Product Manual - 59540-2 September 2014
Page 57
Alarm
n
Value
w
The Alarm
n
activation point
– The value is limited by the scaled input limits
for Process High; Process Low; PV-SP Deviation (+ve above, -ve below
setpoint), Band (above or below setpoint) type alarms.
Rate of Signal Change is a rate of 0.0 to 99999 (rate in
units per minute
).
Memory used, Control Power High, Control Power Low are 0.0 to 100.0%
–
not required for Control Loop or Input Signal Break alarm types.
Alarm
n
Hysteresis
The
deadband on the “safe” side of alarm
n
, through which signal must
pass before alarm deactivates -
not for Rate of Change, Control Loop,
Input Break or Percentage of Memory used alarms.
Alarm
n
Minimum
Duration
w
The minimum time that alarm
n
must be passed its threshold before
activating (deactivation is not affected by this parameter). Adjustable from
0.0 to 9999.0 secs.
–
not used for signal break, memory or loop alarms.
Caution:
If the duration is less than the time set, the alarm will not
become active.
Alarm
n
Inhibit
w
If the inhibit is enabled, it prevents the initial alarm activation if the alarm
condition is true at power up. Activation only occurs once the alarm
condition has passed and then reoccurred.
Control
n
Loop
Alarm Type
w
Sets the loop alarm time source, from: Manual Loop Alarm Time (
as set in
the
loop alarm n time screen
) or Automatic (
twice the integral time constant
setting
). If configured, a Loop Alarm activates if no response is seen in loop
n
after this time following the saturation of its power output.
–
Only seen
if
an alarm is set for control loop type
.
Control
n
Loop
Alarm Time
w
The time (max 99:59 mm:ss) for loop
n
to begin responding after PID
power output reaches saturation, if a manual loop alarm type is configured.
COMMUNICATIONS CONFIGURATION SUB-MENU SCREENS
No Communications
Warning
If Communications Configuration menu is entered without a
communications module fitted.
Modbus Parity
The setting for Modbus comms parity bit checking, from: Odd; Even or
None. Set the same parity for all devices on the network
–
Only seen
if
RS485 or Ethernet communications option is fitted.
Modbus Data Rate
The setting for the Modbus comms data speed. From: 4800; 9600; 19200;
38400; 57600 or 115200 bps. Set the same speed for all devices on the
network
–
Only seen
if RS485 or Ethernet communications option is fitted.
Master Mode, or
Slave Address
Slave address (1 to 255), or multi-zone Setpoint Master Mode
–
Only seen
if RS485 or Ethernet communications option is fitted, but Master mode is
not available over Ethernet.
Target Register In
Slave
Target memory register for the setpoint value in attached slave controllers.
All slaves must have the same setpoint register address as set here -
Appears only if unit is in Master mode.
Master Mode Format
The data format required by the attached setpoint slaves. From: Integer;
integer with 1 decimal place or float -
Appears only if unit is in Master
mode.
Serial
Communications
Write Enable
Enables/disables writing via RS485 or Ethernet communications.
When disabled, parameters can be read, but attempts to change their
values over comms are blocked.
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