Table of Contents
Registers
CB210, CB220, CB280, CB320, CB380, CB400, MSB and CT1820
The following is a chart showing the registers for the above models.
| Register Name | Range | Units | Feature |
|---|---|---|---|
| Input/Output Register P | P0 to P127 | 1 bit | Interface w/ External devices |
| Internal Registers M | M0 to M511 | 1 bit | Internal Registers |
| Special Register F | F0 to F127 | 1 bit | System Status |
| Timer T | T0 to T99 | 16 bit (1 Word) | For Timers |
| Counter C | C0 to C49 | 16 bit (1Word) | For Counters |
| Step Enable S | S0 to S15 | 256 steps (1 Byte) | For Step Enabling |
| Data Memory D | D0 to 99 | 16bit (1 Word) | For Storing Data |
P, M, and F registers are in bit units whereas T, C, and D are in word units. To access P, M, and F registers in word units, use WP, WM, and WF respectively.
| Register Name | Range | Units | Feature |
|---|---|---|---|
| WP | WP0 to 7 | 16 bit (1 Word) | Register P Word Access |
| WM | WM0 to WM31 | 16 bit (1 Word) | Register M Word Access |
| WF | WF0 to WF7 | 16 bit (1 Word) | Register F Word Access |
WP0 consists of registers P0 through P15. P0 is the least significant bit of WP0 and P15 is the most significant bit. These registers are often used with commands like WMOV.
CB290, CB405, CB405RT and CT1721C
The following is a chart showing the registers for the CB290, CB405, CB405RT and CT1721C models. The these models have more M, C, T, and D registers than the CB220 and CB280.
| Register Name | Range | Units | Feature |
|---|---|---|---|
| Input/Output Register | P P0 to P127 | 1 bit | Interface w/ External devices |
| Internal Registers M | M0 to M2047 | 1 bit | Internal Registers |
| Special Register F | F0 to F127 | 1 bit | System Status |
| Timer T | T0 to T255 | 16 bit (1 Word) | For Timers |
| Counter C | C0 to C255 | 16 bit (1 Word) | For Counters |
| Step Enable S | S0 to S15 | 256 steps (1 Byte) | For Step Enabling |
| Data Memory D | D0 to 511 | 16 bit (1 Word) | For Storing Data |
P, M, and F Registers are in bit units whereas T, C, and D are in word units. To access P, M, and F registers in word units, use WP, WM, and WF respectively.
| Register Name | Range | Units | Feature |
|---|---|---|---|
| WP | WP0 to 7 | 16 bit (1 Word) | Register P Word Access |
| WM | WM0 to WM63 | 16 bit (1 Word) | Register M Word Access |
| WF | WF0 to WF7 | 16 bit (1 Word) | Register F Word Access |
MSB Logic Memory
If using MSB Logic, the memory map is slightly different, and a little larger.
| Register Name | Range | Units | Feature |
|---|---|---|---|
| Input Registers | P P0 to P31 | 1 bit | DC24V Input (20V~28V) |
| Output Registers | P P32 to P63 | 1 bit | Output (Relays) |
| Internal Registers M | M0 to M4096 | 1 bit | Internal Registers |
| Special Registers F | F0 to F127 | 1 bit | System Status |
| KEEP Registers K | K0 to K127 | 1 bit | For maintaining data in case of a power loss |
| Timer T | T0 to T253 | 16 bit (1 Word) | For Timers |
| Timer T | T224 to T255 | 16 bit (1 Word) | For KEEP Timers |
| Counter C | C0 to C79 | 16 bit (1 Word) | For Counters |
| Counter C | C80 to C255 | 16 bit (1 Word) | For KEEP Counters |
| Data Memory D | D0 to 511 | 16 bit (1 Word) | For Storing Data |
| System Data Memory D | Y0 to 511 | 16 bit (1 Word) | For Storing System Data |
When using the KEEP registers, you must use KCTU and KCTD instead of CTU and CTD, respectively.
See also AD Input with MSB Logic.