3. Instruction Set
MN05003003E For more information visit: www.eaton.com
3-21
units. The total memeory units occupied by the three instructions cannot be more than 8 units.
If there are more than 8 memory units occupied, the ELC system will execute the instruction
that is scanned first and ignore the rest.
6. In M-PH/M-PA series, only 1 instruction can be executed at the same scan cycle: API 52 MTR,
API 69 SORT, API 70 TKY, API 71 HKY, API 72 DSW, API 74 SEGL, API 75 ARWS.
7. In ELCM-PH/PA series, only 4 instruction can be executed at the same scan cycle: API 56 SPD,
API 169 HOUR.
8. In ELCM-PH/PA series, there is no limitation on the times of using the high-speed output
instructions API 57 PLSY, API 58 PWM, API 59 PLSR, API 156DZRN, API 158 DDRVI, API
159 DDRVA and API 195 DPTPO, but only one high-speed output instruction will be executed
in the same scan time.
9. In ELCM-PH/PA series, there is no limitation on the times of using the communication
instructions API 80 RS, API 100 MODRD, API 101 MODWR, API 150 MODRW, but only one
communication instruction will be executed on single COM port during the same scan cycle.
Numeric Values
1. Devices such as X, Y, M, S are bit addresses and there are only two states, ON and OFF.
However, T, C, D, E, F are data registers or word addresses. Although a bit device can only be
a single point ON/OFF, they can also be used as numeric values in the operands of
instructions if the Kn designation is used in front of the bit address.. The designation Kn placed
in front of a bit address indicates that the bit address is a starting address and the n
determines how many bits follow, where “n” is in the range of 1 to 8. Each n number represents
4 bits. For example, K1M0 represents M0-M3.
2. 16-bits can be represented with K1 to K4, and 32-bits can be represented with K1 to K8. For
example, K2M0 means there are 8-bits from M0 to M7. For the example below, MOV K2M0
D1:
M15 M14 M13 M12 M11 M10 M9 M8 M7 M6 M5 M4 M3 M2 M0M1
00000000
00001 1 1 1
11111111
D1
D1
1111000000000000
b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b0b1
0000000
0
Valid data
Low byte
Low byte
Equal to
Transmit
Clear to 0
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