求翻译：3. IOCU根据应用层的命令，可以对外输出数字量。非安全输出从平台层获得指令到平台对外输出，不超过150ms；安全输出从平台层获得指令到平台对外输出，不超过500ms；是什么意思？

3. Iocu order of the application layer, external digital output. Non-secure output from the platform layer commands to the platform exporting no more than 150ms; safe output from the platform level to access commands to the platform of the external output, no more than 500ms;

3.IOCU depending on the a