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Chapter 5 Instruction specifications
5-118
[9] Timeout :
This bit is set "1" when timeout detected.
[A] Input buffer full :
This bit is set "1" when input buffer full
[B] Conflict error :
This bit is set "1" when TRNS 0 or RECV 0 commands are duplicated.
Bit [6] to [B] is reset at initializing and TRNS 0 executed.
(7) Sending/receiving data format
Set sending data as follows, and Receiving data is set as follows.
[1] Sending/receiving data byte is even. [2] Sending/receiving data byte is odd.
Sending/Receiving data byte (N)
1
st
b
y
te 2
nd
b
y
te
3
rd
b
y
te 4
th
b
y
te
5
th
b
y
te 6
th
b
y
te
7
th
b
y
te 8
th
b
y
te
N-1
th
b
y
te N
th
b
y
te
…
Reserve area
for data
sending/receiving
Sending/Receiving byte (N)
1
st
b
y
te 2
nd
b
y
te
3
rd
b
y
te 4
th
b
y
te
5
th
b
y
te 6
th
b
y
te
7
th
b
y
te 8
th
b
y
te
N
th
b
y
te
(
i
g
nored
)
…
N-2
th
b
y
te N-1
th
b
y
te
Caution
z Be sure to switch port type at first from dedicated port to general purpose port by FUN 5 command in user program.
z
If CPU receives data by RECV command after data sending, received data could be failed depending on timing. In such a
case, TRNS command with "receive enabled" is recommended.
z No contact nor condition is allowed to use with TRNS 0 command.
z Be sure to set [0] Execution bit high in 2
nd
scan or later. (Not in 1
st
scan)
z
If parameter setting is wrong, error code H52 (TRNS/RECV command error) is set in WRF000 in some cases.
z ER signal is set on in the following condition.
Communication executed properly.
z ER signal is set off in the following condition.
- Initialized bit being set "1" while communication.
- CPU status changed RUN→STOP→RUN while communication
-
Timeout while communication.
- s, t parameters overwritten and range error while communication.
TRNS 0 (d, s, t)