AERCO Control System (ACS) - Manual (Page 62)

MC2: 04/23/13 Page 62 of 144
GF-131
AERCO Control System (ACS)
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288
Installation, Operation, and Maintenance Manual
OMM-0081_0D
RAMP UP %/MIN.
Time Required To Go
From 0% To 100%
20 5 Minutes
40 2.5 Minutes
50 2 Minutes
NOTE
TO TURN OFF THE RAMP UP %/MIN FUNCTION, SET THE
VALUE TO ZERO (0).
3.13.6 RAMP DOWN %/MIN
This sets the maximum Percent Level ramp down rate for the ACS. The Percent Level output
will follow the PID output if it is slower than this rate. The default setting is 200% per minute.
Refer to the following example:
RAMP DOWN %/MIN.
Time Required To Go
From 100% To 0%
200 30 Seconds
300 20 Seconds
100 1 Minute
NOTE
To turn off the RAMP DOWN %/MIN function, set the value to
zero (0).
3.13.7 RESET DEFAULTS
This option is used to set the ACS to its factory default values. Make sure that you want to reset
all options before activating.
3.13.8 PASSTHRU WRITE
This is the enable/disable for the write functionality when MODBUS PASSTHRU is enabled in
the RS232 menu. When set to the default value, DISABLED, it will allow only reading of values
but no writing of values. To allow writing of any values, this must be set to ENABLED.
3.13.9 VALVE WAIT TIME
This value tells how long to wait for the hydronic valve to transition between open and closed.
The Valve End Switch status is not correct after this time expires, a fault message will be
displayed - VALVE POS ISSUE (Valve Position Issue).
3.13.10 SYSTEM OVERRIDE (Modbus Enable/Disable)
This is a Modbus Enable/Disable feature. It can only be accessed via the Modbus slave port
(RS232 port) on the ACS. It basically mimics the pressing of the On/Off front panel button. This
setting is located at Modbus Address 0x00A0 or 160. To override the system Off, you must write
204 to that address. To override the system On, you must write 51 to that address. Writing any