PLC类型常量
在本节中：
SYS_CURRENT_PLC
SYS_FP_X0
SYS_FP_X0_2_5k
SYS_FP_X0_8k
SYS_FP_X0_16k
SYS_FP_X
SYS_FP_X_Transistor
SYS_FP_X_Relay
SYS_FP_X_2_5k
SYS_FP_XL_16k
SYS_FP_XL_32k
SYS_FP_X_16k
SYS_FP_X_32k
SYS_FP_XT_16k
SYS_FP_XT_32k
SYS_FP_XH
SYS_FP_XH_Transistor
SYS_FP_XH_Relay
SYS_FP_XH_R_16k
SYS_FP_XH_R_32k
SYS_FP_XH_T_16k
SYS_FP_XH_T_32k
SYS_FP_XH_C38AT_32k
SYS_FP_XH_C38AT_FP_X_MODE_32k
SYS_FP_XH_M4T16T_32k
SYS_FP_XH_M8N16T_32k
SYS_FP_XH_M8N30T_32k
SYS_FP_XH_ET_32k
SYS_FP_XH_ETF_32k
SYS_FP_X_XH
SYS_FP_X_XH_Transistor
SYS_FP_X_XH_Relay
SYS_FP_SIGMA
SYS_FP_SIGMA_12k
SYS_FP_SIGMA_16k
SYS_FP_SIGMA_32k
SYS_FP_SIGMA_40k
SYS_FP0R
SYS_FP0RC_16k
SYS_FP0RC_32k
SYS_FP0RT_32k
SYS_FP0RF_32k
SYS_FP0
SYS_FP0_2_7k
SYS_FP0_5k
SYS_FP0_10k
SYS_FP_J_15k
SYS_FP_e
SYS_FP_e_2_7k
SYS_EcoLogiX
SYS_ELC500
SYS_FP7
SYS_FP7_CPS2R_CPS21
SYS_FP7_CPS3R_CPS31
SYS_FP7_CPS3RS_CPS31S
SYS_FP7_CPS3RE_CPS31E
SYS_FP7_CPS3RES_CPS31ES
SYS_FP7_CPS4RE_CPS41E
SYS_FP7_CPS4RES_CPS41ES
SYS_FP0H
SYS_FP0H_C32_T
SYS_FP0H_C32_T_FP_SIGMA_MODE
SYS_FP0H_C32_ET
SYS_FP0H_C32_ET_FP_SIGMA_MODE
SYS_FP2
SYS_FP2_16k
SYS_FP2_32k
SYS_FP2SH
SYS_FP2SH_32k
SYS_FP2SH_60k
SYS_FP2SH_120k
SYS_FP1
SYS_FP1_0_9k
SYS_FP1_2_7k
SYS_FP1_5k
SYS_FP_M
SYS_FP_ML_0_9k
SYS_FP_M_2_7k
SYS_FP_M_5k
SYS_FP3_FP_C
SYS_FP3_10k
SYS_FP3_FP_C_16k
SYS_FP5
SYS_FP5_16k
SYS_FP5_24k
SYS_FP10
SYS_FP10_FP10S_30k
SYS_FP10_60k
SYS_FP10SH
SYS_FP10SH_30k
SYS_FP10SH_60k
SYS_FP10SH_120k