Latched Devices - Delta AH Series Operation Manual

AH Mo t io n C on tr o ll er – O p er a t io n M a nu a l

5.2.3. Latched Devices


Latched areas of each type of device
Device
X
Y
M*
SM
S
T*
C*
HC/AC*
D*
_5
SR
L
E
*Note: You can define the range of latched areas for T, C, M and D and set the devices to be non-latched. Note that the
range should not exceed the available device range, and only 32768 D devices at most can be non-latched. For example,
you can set D50~D32817 or D32768~D65535 to latched area though the default range of latched areas is D0~D32767.
Do not disconnect power or CPU module while the power is on. Once the PLC is disconnected from the backplane, the
data in the latched area such as devices will be affected.
5 - 4
Function Device range
X devices (bit):
Input relay X0.0~X511.15
X devices (word): X0~X511
Y devices (bit):
Output relay Y0.0~Y511.15
Y devices (word): Y0~Y511
Auxiliary relay M0~M8191
Special
SM: SM0~SM2047
auxiliary relay
Stepping relay S0~S2047
Timer T0~T2047
Counter C0~C2047
HC: HC0~HC63
32-bit counter AC: AC0~ AC55
(AHxxEMC)
D device (bit):
D0.0~D65535.15
Data register
D device (word):
D0~D65535
Special data
SR: SR0~SR2047
register
Link register L0~ L65535
Index register E0~E31
Latched area
All devices are non-latched.
All devices are non-latched.
Default: M0~M8191
Some devices are latched, and can not be
changed. Refer to the table of special auxiliary
relays in the appendices for more information.
All devices are non-latched.
Default: T0~T2047.
Default: C0~C2047.
Default: HC0~HC63.
AC devices are non-latched.
Default: D0~D32767.
At most 32768 devices can be latched devices.
Some are latched, and can not be changed.
Refer to the list of special data registers for more
information.
All devices are non-latched.
All devices are non-latched.