在结构化文本中向字节添加1个
我正在尝试实现以下逻辑：
如果BCC = STX或 bcc = cr，然后bcc：= +1（增量 1）。
BCC是一个字节，如果以上条件为真，我正在尝试将其递增1。
我的代码是：
如果message_byte [11] = 16＃0d或message_byte [11] = 16＃02然后 message_byte [11]：= message_byte [11] + to_byte（1）; end_if
message_byte是一个字节的数组，我想访问特定的字节。但是，当我说无法添加时，这给了我一个错误。
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I'm trying to implement the logic below:
if bcc = STX or
bcc = CR, then bcc := +1 (increment
of 1).
bcc is a byte and i'm trying to increment it by 1 if this condition above is true.
my code is:
IF message_byte[11] = 16#0D OR message_byte[11] = 16#02 THEN
message_byte[11] := message_byte[11] + TO_BYTE(1);
END_IF
where message_byte is an array of bytes and I want to access a specific one. However, it gives me an error when saying it can't be added.
any help is appreciated
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我相信错误是告诉您Message_byte [11]（添加的左操作者）不是类型的字节，因此编译器无法弄清楚如何向其添加字节 - 如DWPESSOA所说。我也不知道什么是“字节”的数据类型 - 也许应该是字节。
当您获得这些类型的错误时，请尝试分解任务，然后尝试绝对基础知识 - 只需尝试将1添加到Message_byte [11]。那么解决错误将更容易。
I believe the error is telling you that message_byte[11] (left operant of your addition) is not a type BYTE, so the compiler can’t figure out how to add a BYTE to it - as commented by dwpessoa. I also don’t know what a data type “BYTES” is - maybe that should just be BYTE.
When you get these types of errors, try breaking apart your task and just try the absolute basics - just try adding 1 to message_byte[11]. Then it will be easier to solve the error.