Koso REXA Electraulic Xpac, Installation And Operation Manual

Page: 45 / 164

REXA
Electraulic Actuators & Drives
Xpac
Installation Manual -- Version 5.1 (5/08)
37
Optional features are discussed in Appendix C.
POWER MODULE TYPE
SIGNAL TYPE
PH - Move to the position specified by the parameter
Position High .
OFF- Override this feature for use with 0-20 mA signals.
Control signals less than 2.5 mA are valid.
If the control signal becomes invalid, the actuator seeks the selected
failsafe position, displays error code E-CS and de-energizes the alarm
relay. After invoking the selected failsafe action, the actuator con-
tinues monitoring the control signal. If the signal returns to a valid
value (greater than 2.5 mA), the actuator will clear the error code,
turn off the alarm and resume tracking the control signal. However,
if
Bumpless Transfer is set to ON, the actuator may encounter a
bumpless transfer error and not go on-line.
Signal Type (St) specifies the input signal to which the actuator will
respond. Selecting Analog (A) specifies a standard two-wire loop.
Selecting Pulse (P) specifies a pulse input signal which is used in
conjunction with the Pulse Input Board (See Appendix P). When
Analog is selected, sub-menu CAL provides two setable parameters,
SL and SH, which are used to calibrate the actuator to the analog sig-
nal. When Pulse is selected, sub-menu CAL provides two different
setable parameters, Pd and PI, which are used to specify the pulse
duration and the actuator position change for each input pulse.
Power Module Type (dt) defines within the control program charac-
teristic features specific to the B, C or ½D and D size power module
and cylinder combination. The value will typically be factory set. If
a change must be made, simply enable the parameter by pressing the
(E)NTER key and select the correct power module type and either 1,
2 or 3 depending upon the stroking rate of the actuator.
LINEAR
If rate is Faster than 15
sec
/
inch
(13, 10, etc.), select a 1.
If rate is Between 15
sec
/
inch
and 30
sec
/
inch
(20, 24, etc.), select a 2.
If rate is Slower than 30
sec
/
inch
(40, 50), select a 3.
ROTARY
If rate is Faster than 15
sec
/
90°
(13, 8, etc.), select a 1.
If rate is Between 15
sec
/
90°
and 30
sec
/
90°
(17, 25, etc.), select a 2.
If rate is Slower than 30
sec
/
90°
(40, 50), select a 3.