3. Instruction Set
API
Mnemonic Operands Function
186 MBRD P
Matrix bit read
Type
OP
Bit Devices Word devices Program Steps
X Y M S K H KnX
KnY
KnM
KnS
T C D E F
MBRD, MBRDP: 7 steps
SS2
SX2
SS2
SX2
SS2
SX2
Operands:
S: Matrix source device n: Matrix length (K1~K256). D: Pointer Pr (bit number)
Explanations:
1. MBRD instruction reads the bit status of the matrix. When MBRD executes, the status of
M1094 (Matrix pointer clear flag) will be checked first. If M1094 = ON, Pr value in D will be
cleared and the instruction reads from the first bit. The bit status is read out and mapped to
M1095 (Carry flag for matrix operation). After a bit is read, MBRD checks the status of M1093
(Matrix pointer increasing flag). If M1093 = ON, MBRD instruction will proceed to read the next
bit, i.e. Pr value plus 1. When MBRD proceeds to the last bit, M1089 = ON, indicating the end
of the Matrix, and D records the last bit number. After this, MBRD instruction stops.
2. The Pointer (Pr) of the matrix is designated by the user in the instruction. The valid range of Pr
is 0 ~ 16n -1, corresponding to b0 ~ b16n-1 in the matrix. If the Pr value exceeds the valid
range, M1092 = ON and the instruction will be disabled.
3. If operands S or D use KnX, KnY, KnM, KnS format, only n = 4 is applicable.
Program Example:
1. When X0 goes from OFF→ON with M1094 = ON (Clear Pr value) and M1093 = ON (Increase
Pr value), the reading will start from the first bit and Pr value increases 1 after a bit is read.
2. Assume present value of pointer D20 = 45, the following 3 results (, , ) can be obtained
when X0 is executed from OFF→ON for 3 times.
D20 = 45, M1095 = OFF, M1089 = OFF
D20 = 46, M1095 = ON (bit status is ON), M1089 = OFF.
D20 = 47, M1095 = OFF, M1089 = ON. (reading proceeds to the last bit)
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