在以上过程中,供热调度部门需要对分散在不同地理位置换热站中温度、压力、流量、液位等参数集中实时监视,控制换热站中各设备的运行。同时,根据从现场监测到的各换热站运行参数,调节热电厂运行工况,保证冬季整个供暖的稳定运行。 因此,各换热站现场参数的采集、调度室与各换热站的数据实时通讯就显得至关重要。在这里,笔者提出一种先进的无线监控方案:各换热站中安装北京和利时系统工程股份有限公司的HOLLiAS-PLC G5完成对现场参数采集、设备控制,现场HOLLiAS-PLC G5通过GPRS网络与调度中心控制计算机建立可靠、稳定的通讯,在调度中心可对现场所有换热站完成监视、控制。 1747-PT1CC HANDHELD TERMINAL CARRYING CASE 1747-PTA1E MEMORY PAK-ENGLISH 1747-PTA1F MEMORY PAK- FRENCH 1747-PTA1G MEMORY PAK- GERMAN 1747-PTA1I MEMORY PAK- ITALIAN 1747-R21 ENGLISH MEMORY PAK 1747-R21F FRENCH MEMORY PAK 1747-R5 RE**CEMENT PARTS 1747-R7 RE**CEMENT PARTS 1747-RL302 UPGRADE KIT 1747-RL401 UPGRADE KIT 1747-SCNR CONTROLNET SCANNER FOR SLC **TFORM 1747-SDN DEVICENET SCANNER MODULE 1747-SN REMOTE I/O SCANNER MODULE 1756 MFR. PART NUMBER DESCRIPTION 1756-A10 10 SLOT CONTROLLOGIX CHASSIS 1756-A13 13 SLOT CONTROLLOGIC CHASSIS 1756-A17 CHASSIS 17 SLOT CONTROLLOGIX 1756-A4 4 SLOT CONTROLLOGIX CHASIS 1756-A7 7 SLOT CONTROLLOGIX CHASSIS 1756-BA1 LOGIX5000 BATTERY ASSEMBLY 1756-CFM 2 CHANNEL /2 OUT CONFIGURABLE FLOWMETER 1756-CNB CONTROLNET BRIDGE MODULE 1756-CNBR CONTROLNET REDUNDANT BRIDGE MODULE 1756-CP3 LOGIX5000 RS232 PROGRAMMER CABLE 1756-DHRIO 2 CHANNEL DH+ AND/OR RIO SCANNER 1756-DNB DEVICE NET BRIDGE/SCANNER MODULE 1756-DPALEN CONTROLLOGIC SYSTEM DOCUMENTATION SET PRINTED 1756-ENET ETHERNET/IP BRIDGE MODULE 1756-GTWY CONTROLLOGIC GATEWAY CONFIGURATION SOFTWARE