Do-More/BRX PLC Data Types

I noted in a previous post that I can never remember the data types for timer or counter presets, what the highest internal relay address is, or which C-more data type corresponds to which PLC data type, etc. So here are the charts of Do-More/BRX PLC data types I refer to when programming the BRX series of PLCs from AutomationDirect.

• Bits
• Words
• Double Words
• Real (Floating Point) Numbers
• Strings
• Timers
• Counters

Notes: In the following tables, C-more Memory types ending in “_R” indicate that a C-more tag created with this memory can read from the PLC but not write to it.

The address ranges given below are the default ranges. The address ranges can be changed in the PLC > System Configuration > Memory Configuration dialog.

Bits

Do-More Address Range	Data Type	Value Range	Size	Members	C-More Data Type	C-more Memory Type
C0 – C2047	bit	0 to 1	1 bit	–	Discrete	DISC, DISC_R
ST0 – ST1023	bit	0 to 1	1 bit	–	Discrete	DISC, DISC_R
X0 – X2047	bit	0 to 1	1 bit	–	Discrete	DISC, DISC_R
Y0 – Y2047	bit	0 to 1	1 bit	–	Discrete	DISC, DISC_R
DLX0 – DLX777	bit	0 to 1	1 bit	–	Discrete	DISC, DISC_R
DLY0 – DLY777	bit	0 to 1	1 bit	–	Discrete	DISC, DISC_R
DLC0 – DLC777	bit	0 to 1	1 bit	–	Discrete	DISC, DISC_R
MI0 – MI1023	bit	0 to 1	1 bit	–	Discrete	DISC, DISC_R
MC0 – MC1023	bit	0 to 1	1 bit	–	Discrete	DISC, DISC_R

Words

Do-More Address Range	Data Type	Value Range	Size	Members	C-More Data Type	C-more Memory Type
V0 – V4095	Unsigned Word	0 to 65,535	16 bits	–	Unsigned int 16	UI16, UI16_R
N0 – N4095	Signed Word	-32,768 to 32,767	16 bits	–	Signed int 16	SI16, SI16_R
WX0 – WX255	Signed Word	-32,768 to 32,767	16 bits	–	Signed int 16	SI16, SI16_R
WY0 – WY255	Signed Word	-32,768 to 32,767	16 bits	–	Signed int 16	SI16, SI16_R
MIR0 – MIR2047	Signed Word	-32,768 to 32,767	16 bits	–	Signed int 16	SI16, SI16_R
MHR0 – MIR2047	Signed Word	-32,768 to 32,767	16 bits	–	Signed int 16	SI16, SI16_R

Double Words

Do-More Address Range	Data Type	Value Range	Size	Members	C-More Data Type	C-more Memory Type
D0 – D4095	Signed Double Word	-2,147,483,648 to 2,147,483,647	32 bits	–	Signed int 32	SI32, SI32_R
DST0 – DST511	Signed Double Word	-2,147,483,648 to 2,147,483,647	32 bits	–	Signed int 32	SI32, SI32_R

Real

Do-More Address Range	Data Type	Value Range	Size	Members	C-More Data Type	C-more Memory Type
R0 – R4095	Real	-3.4e+38 to +3.4e+38	32 bits	–	Floating PT 32	FLOAT, FLOAT_R
RX0 – RX255	Real	-3.4e+38 to +3.4e+38	32 bits	–	Floating PT 32	FLOAT, FLOAT_R
RY0 – RY255	Real	-3.4e+38 to +3.4e+38	32 bits	–	Floating PT 32	FLOAT, FLOAT_R

Strings

Do-More Address Range	Data Type	Value Range	Size	Members	C-More Data Type	C-more Memory Type
SS0 – SS127	Short String		64 bytes (64 characters)	(see next row)	Ascii String	ASCII, ASCII_R
				.Length .MaxLength	Unsigned int 16 Unsigned int 16	UI16, UI16_R
SL0 – SL63	Long String		256 bytes (256 characters)	(see next row)	Ascii String	ASCII, ASCII_R
				.Length .MaxLength	Unsigned int 16 Unsigned int 16	UI16, UI16_R

Timers

Do-More Address Range	Data Type	Value Range	Size	Members	C-More Data Type	C-more Memory Type
T0 – T255	Timer	0 to 2,147,483,647 milliseconds	–	(see next rows)	–	–
			32 bits	preset (can be a D double word location)	Signed int 32	SI32, SI32_R
			32 bits	.Acc (read/write)	Signed int 32	SI32, SI32_R
			1 bit	.Done (read-only)	Discrete	DISC, DISC_R
			1 bit	.Zero (read-only)	Discrete	DISC, DISC_R
			1 bit	.Timing (read-only)	Discrete	DISC, DISC_R
			1 bit	.Reset (read-only)	Discrete	DISC, DISC_R
			1 bit	.TT (read-only)	Discrete	DISC, DISC_R
			1 bit	.EN (read-only)	Discrete	DISC, DISC_R
			1 bit	.DN (read-only)	Discrete	DISC, DISC_R

Counters

Do-More Address Range	Data Type	Value Range	Size	Members	C-More Data Type	C-more Memory Type
CT0 – CT255	Counter	-2,147,483,648 to 2,147,483,647	–	(see next rows)	–	–
			32 bits	preset (can be a D double word location)	Signed int 32	SI32, SI32_R
			32 bits	.Acc (read/write)	Signed int 32	SI32, SI32_R
			1 bit	.Done (read-only)	Discrete	DISC, DISC_R
			1 bit	.Zero (read-only)	Discrete	DISC, DISC_R
			1 bit	.Reset (read-only)	Discrete	DISC, DISC_R
			1 bit	.DnDone (read-only)	Discrete	DISC, DISC_R

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